Remove some ScopedNSAutoreleasePool usage.

This touches a lot of ancient code that trips the presubmit, so
skip the presubmit.

BUG=772489

Change-Id: Ifea8ca3bd1ebb92eaa47421a6000ae70a25fe3e5
No-Presubmit: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1783211
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Yuwei Huang <yuweih@chromium.org>
Reviewed-by: Miguel Casas <mcasas@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694364}

base/ios/crb_protocol_observers_unittest.mm

@@ -5,7 +5,6 @@
 #import "base/ios/crb_protocol_observers.h"
 #include "base/ios/weak_nsobject.h"
 #include "base/logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
@@ -122,11 +121,10 @@ TEST_F(CRBProtocolObserversTest, WeakReference) {
 
   [observers_ addObserver:partial_observer_];
 
-  {
   // Need an autorelease pool here, because
   // -[CRBProtocolObservers forwardInvocation:] creates a temporary
   // autoreleased array that holds all the observers.
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     [observers_ requiredMethod];
     EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
   }

base/ios/weak_nsobject.mm

@@ -4,7 +4,6 @@
 
 #include "base/ios/weak_nsobject.h"
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 
 namespace {
@@ -34,9 +33,9 @@ WeakContainer::~WeakContainer() {}
 + (scoped_refptr<base::WeakContainer>)containerForObject:(id)object {
   if (object == nil)
     return nullptr;
-  // The autoreleasePool is needed here as the call to objc_getAssociatedObject
+  // The autoreleasepool is needed here as the call to objc_getAssociatedObject
   // returns an autoreleased object which is better released sooner than later.
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     CRBWeakNSProtocolSentinel* sentinel =
         objc_getAssociatedObject(object, &sentinelObserverKey_);
     if (!sentinel) {
@@ -51,6 +50,7 @@ WeakContainer::~WeakContainer() {}
       DCHECK_EQ(2u, [sentinel retainCount]);
     }
     return [sentinel container];
+  }
 }
 
 - (id)initWithContainer:(scoped_refptr<base::WeakContainer>)container {

base/mac/bind_objc_block_unittest.mm

@@ -7,7 +7,6 @@
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
@@ -108,8 +107,7 @@ TEST(BindObjcBlockTest, TestSixArguments) {
 TEST(BindObjcBlockTest, TestBlockMoveable) {
   base::OnceClosure c;
   __block BOOL invoked_block = NO;
-  {
-    base::mac::ScopedNSAutoreleasePool autorelease_pool;
+  @autoreleasepool {
     c = base::BindOnce(base::RetainBlock(^(std::unique_ptr<BOOL> v) {
                          invoked_block = *v;
                        }),
@@ -139,8 +137,7 @@ TEST(BindObjcBlockTest, TestBlockDeallocation) {
 
 TEST(BindObjcBlockTest, TestBlockReleased) {
   base::WeakNSObject<NSObject> weak_nsobject;
-  {
-    base::mac::ScopedNSAutoreleasePool autorelease_pool;
+  @autoreleasepool {
     NSObject* nsobject = [[[NSObject alloc] init] autorelease];
     weak_nsobject.reset(nsobject);
 

base/mac/foundation_util_unittest.mm

@@ -11,7 +11,6 @@
 #include "base/files/file_path.h"
 #include "base/format_macros.h"
 #include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "build/build_config.h"
@@ -162,14 +161,13 @@ TEST(FoundationUtilTest, CFCast) {
 }
 
 TEST(FoundationUtilTest, ObjCCast) {
-  ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     id test_array = @[];
     id test_array_mutable = [NSMutableArray array];
     id test_data = [NSData data];
     id test_data_mutable = [NSMutableData dataWithCapacity:10];
     id test_date = [NSDate date];
-  id test_dict = @{ @"meaning" : @42 };
+    id test_dict = @{@"meaning" : @42};
     id test_dict_mutable = [NSMutableDictionary dictionaryWithCapacity:10];
     id test_number = @42;
     id test_null = [NSNull null];
@@ -239,11 +237,9 @@ TEST(FoundationUtilTest, ObjCCast) {
 
     // ObjCCastStrict: correct cast results in correct pointer being returned.
     EXPECT_EQ(test_array, ObjCCastStrict<NSArray>(test_array));
-  EXPECT_EQ(test_array_mutable,
-            ObjCCastStrict<NSArray>(test_array_mutable));
+    EXPECT_EQ(test_array_mutable, ObjCCastStrict<NSArray>(test_array_mutable));
     EXPECT_EQ(test_data, ObjCCastStrict<NSData>(test_data));
-  EXPECT_EQ(test_data_mutable,
-            ObjCCastStrict<NSData>(test_data_mutable));
+    EXPECT_EQ(test_data_mutable, ObjCCastStrict<NSData>(test_data_mutable));
     EXPECT_EQ(test_date, ObjCCastStrict<NSDate>(test_date));
     EXPECT_EQ(test_dict, ObjCCastStrict<NSDictionary>(test_dict));
     EXPECT_EQ(test_dict_mutable,
@@ -251,13 +247,10 @@ TEST(FoundationUtilTest, ObjCCast) {
     EXPECT_EQ(test_number, ObjCCastStrict<NSNumber>(test_number));
     EXPECT_EQ(test_null, ObjCCastStrict<NSNull>(test_null));
     EXPECT_EQ(test_set, ObjCCastStrict<NSSet>(test_set));
-  EXPECT_EQ(test_set_mutable,
-            ObjCCastStrict<NSSet>(test_set_mutable));
+    EXPECT_EQ(test_set_mutable, ObjCCastStrict<NSSet>(test_set_mutable));
     EXPECT_EQ(test_str, ObjCCastStrict<NSString>(test_str));
-  EXPECT_EQ(test_str_const,
-            ObjCCastStrict<NSString>(test_str_const));
-  EXPECT_EQ(test_str_mutable,
-            ObjCCastStrict<NSString>(test_str_mutable));
+    EXPECT_EQ(test_str_const, ObjCCastStrict<NSString>(test_str_const));
+    EXPECT_EQ(test_str_mutable, ObjCCastStrict<NSString>(test_str_mutable));
 
     // ObjCCastStrict: Giving a nil provides a nil.
     EXPECT_FALSE(ObjCCastStrict<NSArray>(nil));
@@ -268,6 +261,7 @@ TEST(FoundationUtilTest, ObjCCast) {
     EXPECT_FALSE(ObjCCastStrict<NSNumber>(nil));
     EXPECT_FALSE(ObjCCastStrict<NSSet>(nil));
     EXPECT_FALSE(ObjCCastStrict<NSString>(nil));
+  }
 }
 
 TEST(FoundationUtilTest, GetValueFromDictionary) {

base/mac/objc_release_properties_unittest.mm

@@ -5,7 +5,6 @@
 #include "base/mac/objc_release_properties.h"
 #include "base/stl_util.h"
 
-#import "base/mac/scoped_nsautorelease_pool.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #import <objc/runtime.h>
@@ -268,9 +267,7 @@ TEST(ObjCReleasePropertiesTest, SesameStreet) {
   // Make sure that worked before things get more involved.
   EXPECT_EQ(3, ah_ah_ah);
 
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     test_object.baseCvcRetain = [CountVonCount countVonCount];
     test_object.baseCvcCopy = [CountVonCount countVonCount];
     test_object.baseCvcAssign = baseAssign;
@@ -324,9 +321,7 @@ TEST(ObjCReleasePropertiesTest, SesameStreet) {
   // readonly.
   EXPECT_EQ(6, ah_ah_ah);
 
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     // Put things back to how they were.
     test_object.baseCvcRetain = [CountVonCount countVonCount];
     test_object.baseCvcCopy = [CountVonCount countVonCount];

base/mac/scoped_nsautorelease_pool.h

@@ -21,6 +21,8 @@ namespace mac {
 // sends it a -drain message when destroyed.  This allows an autorelease pool to
 // be maintained in ordinary C++ code without bringing in any direct Objective-C
 // dependency.
+//
+// Use only in C++ code; use @autoreleasepool in Obj-C(++) code.
 
 class BASE_EXPORT ScopedNSAutoreleasePool {
  public:

base/mac/scoped_nsobject.h

@@ -36,11 +36,10 @@ namespace base {
 // scoped_nsprotocol<> has the same behavior as scoped_nsobject, but can be used
 // with protocols.
 //
-// scoped_nsobject<> is not to be used for NSAutoreleasePools. For
-// NSAutoreleasePools use ScopedNSAutoreleasePool from
-// scoped_nsautorelease_pool.h instead.
-// We check for bad uses of scoped_nsobject and NSAutoreleasePool at compile
-// time with a template specialization (see below).
+// scoped_nsobject<> is not to be used for NSAutoreleasePools. For C++ code use
+// NSAutoreleasePool; for Objective-C(++) code use @autoreleasepool instead. We
+// check for bad uses of scoped_nsobject and NSAutoreleasePool at compile time
+// with a template specialization (see below).
 //
 // If Automatic Reference Counting (aka ARC) is enabled then the ownership
 // policy is not controllable by the user as ARC make it really difficult to
@@ -187,7 +186,7 @@ class scoped_nsobject : public scoped_nsprotocol<NST*> {
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
   static_assert(std::is_same<NST, NSAutoreleasePool>::value == false,
-                "Use ScopedNSAutoreleasePool instead");
+                "Use @autoreleasepool instead");
 #endif
 };
 

base/mac/scoped_nsobject_unittest.mm

@@ -4,7 +4,6 @@
 
 #include <vector>
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -24,8 +23,7 @@ TEST(ScopedNSObjectTest, ScopedNSObject) {
     base::scoped_nsobject<NSObject> p3 = p1;
     ASSERT_EQ(p1.get(), p3.get());
     ASSERT_EQ(2u, [p1 retainCount]);
-    {
-      base::mac::ScopedNSAutoreleasePool pool;
+    @autoreleasepool {
       p3 = p1;
     }
     ASSERT_EQ(p1.get(), p3.get());
@@ -46,8 +44,7 @@ TEST(ScopedNSObjectTest, ScopedNSObject) {
 
   base::scoped_nsobject<NSObject> p6 = p1;
   ASSERT_EQ(3u, [p6 retainCount]);
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     p6.autorelease();
     ASSERT_EQ(nil, p6.get());
     ASSERT_EQ(3u, [p1 retainCount]);

base/system/sys_info_ios.mm

@@ -13,7 +13,6 @@
 
 #include "base/logging.h"
 #include "base/mac/scoped_mach_port.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/process/process_metrics.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
@@ -43,9 +42,10 @@ std::string SysInfo::OperatingSystemName() {
   static dispatch_once_t get_system_name_once;
   static std::string* system_name;
   dispatch_once(&get_system_name_once, ^{
-    base::mac::ScopedNSAutoreleasePool pool;
+    @autoreleasepool {
       system_name = new std::string(
           SysNSStringToUTF8([[UIDevice currentDevice] systemName]));
+    }
   });
   // Examples of returned value: 'iPhone OS' on iPad 5.1.1
   // and iPhone 5.1.1.
@@ -57,9 +57,10 @@ std::string SysInfo::OperatingSystemVersion() {
   static dispatch_once_t get_system_version_once;
   static std::string* system_version;
   dispatch_once(&get_system_version_once, ^{
-    base::mac::ScopedNSAutoreleasePool pool;
+    @autoreleasepool {
       system_version = new std::string(
           SysNSStringToUTF8([[UIDevice currentDevice] systemVersion]));
+    }
   });
   return *system_version;
 }
@@ -68,7 +69,7 @@ std::string SysInfo::OperatingSystemVersion() {
 void SysInfo::OperatingSystemVersionNumbers(int32_t* major_version,
                                             int32_t* minor_version,
                                             int32_t* bugfix_version) {
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     std::string system_version = OperatingSystemVersion();
     if (!system_version.empty()) {
       // Try to parse out the version numbers from the string.
@@ -81,6 +82,7 @@ void SysInfo::OperatingSystemVersionNumbers(int32_t* major_version,
       if (num_read < 3)
         *bugfix_version = 0;
     }
+  }
 }
 
 // static

base/test/test_listener_ios.mm

@@ -6,7 +6,6 @@
 
 #import <Foundation/Foundation.h>
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // The iOS watchdog timer will kill an app that doesn't spin the main event
@@ -22,11 +21,11 @@ class IOSRunLoopListener : public testing::EmptyTestEventListener {
 };
 
 void IOSRunLoopListener::OnTestEnd(const testing::TestInfo& test_info) {
-  base::mac::ScopedNSAutoreleasePool scoped_pool;
-
+  @autoreleasepool {
     // At the end of the test, spin the default loop for a moment.
     NSDate* stop_date = [NSDate dateWithTimeIntervalSinceNow:0.001];
     [[NSRunLoop currentRunLoop] runUntilDate:stop_date];
+  }
 }
 
 }  // namespace

base/test/test_support_ios.mm

@@ -6,7 +6,6 @@
 
 #include "base/debug/debugger.h"
 #include "base/logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/message_loop/message_pump.h"
 #include "base/message_loop/message_pump_default.h"
@@ -209,11 +208,12 @@ void RunTestsFromIOSApp() {
   static bool ran_hook = false;
   if (!ran_hook) {
     ran_hook = true;
-    mac::ScopedNSAutoreleasePool pool;
-    int exit_status = UIApplicationMain(g_argc, g_argv, nil,
-                                        @"ChromeUnitTestDelegate");
+    @autoreleasepool {
+      int exit_status =
+          UIApplicationMain(g_argc, g_argv, nil, @"ChromeUnitTestDelegate");
       exit(exit_status);
     }
+  }
 }
 
 }  // namespace base

chrome/app/chrome_main_mac.mm

@@ -12,7 +12,6 @@
 #include "base/logging.h"
 #import "base/mac/bundle_locations.h"
 #import "base/mac/foundation_util.h"
-#import "base/mac/scoped_nsautorelease_pool.h"
 #include "base/path_service.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/common/chrome_constants.h"
@@ -20,19 +19,18 @@
 #include "content/public/common/content_paths.h"
 
 void SetUpBundleOverrides() {
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     base::mac::SetOverrideFrameworkBundlePath(chrome::GetFrameworkBundlePath());
 
     NSBundle* base_bundle = chrome::OuterAppBundle();
     base::mac::SetBaseBundleID([[base_bundle bundleIdentifier] UTF8String]);
 
     base::FilePath child_exe_path =
-      chrome::GetFrameworkBundlePath()
-          .Append("Helpers")
-          .Append(chrome::kHelperProcessExecutablePath);
+        chrome::GetFrameworkBundlePath().Append("Helpers").Append(
+            chrome::kHelperProcessExecutablePath);
 
     // On the Mac, the child executable lives at a predefined location within
     // the app bundle's versioned directory.
     base::PathService::Override(content::CHILD_PROCESS_EXE, child_exe_path);
+  }
 }

chrome/app_shim/app_mode_loader_mac.mm

@@ -18,7 +18,6 @@
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
 #import "base/mac/launch_services_util.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/process/launch.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/sys_string_conversions.h"
@@ -38,8 +37,7 @@ int LoadFrameworkAndStart(int argc, char** argv) {
   using base::mac::CFCastStrict;
   using base::mac::NSToCFCast;
 
-  base::mac::ScopedNSAutoreleasePool scoped_pool;
-
+  @autoreleasepool {
     // Get the current main bundle, i.e., that of the app loader that's running.
     NSBundle* app_bundle = [NSBundle mainBundle];
     CHECK(app_bundle) << "couldn't get loader bundle";
@@ -172,8 +170,8 @@ int LoadFrameworkAndStart(int argc, char** argv) {
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
             app_mode::kLaunchedByChromeProcessId)) {
       // Pass --app-shim-error to have Chrome rebuild this shim.
-    // If Chrome has rebuilt this shim once already, then rebuilding doesn't fix
-    // the problem, so don't try again.
+      // If Chrome has rebuilt this shim once already, then rebuilding doesn't
+      // fix the problem, so don't try again.
       if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
               app_mode::kLaunchedAfterRebuild)) {
         command_line.AppendSwitchPath(app_mode::kAppShimError,
@@ -182,14 +180,15 @@ int LoadFrameworkAndStart(int argc, char** argv) {
     } else {
       // If the shim was launched directly (instead of by Chrome), first ask
       // Chrome to launch the app. Chrome will launch the shim again, the same
-    // error will occur and be handled above. This approach allows the app to be
-    // started without blocking on fixing the shim and guarantees that the
+      // error will occur and be handled above. This approach allows the app to
+      // be started without blocking on fixing the shim and guarantees that the
       // profile is loaded when Chrome receives --app-shim-error.
       command_line.AppendSwitchPath(switches::kProfileDirectory, profile_dir);
       command_line.AppendSwitchASCII(switches::kAppId, app_mode_id);
     }
     // Launch the executable directly since base::mac::OpenApplicationWithPath
-  // doesn't pass command line arguments if the application is already running.
+    // doesn't pass command line arguments if the application is already
+    // running.
     if (!base::LaunchProcess(command_line, base::LaunchOptions()).IsValid()) {
       LOG(ERROR) << "Could not launch Chrome: "
                  << command_line.GetCommandLineString();
@@ -197,6 +196,7 @@ int LoadFrameworkAndStart(int argc, char** argv) {
     }
 
     return 0;
+  }
 }
 
 } // namespace

chrome/app_shim/chrome_main_app_mode_mac.mm

@@ -18,7 +18,6 @@
 #include "base/logging.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/macros.h"
 #include "base/message_loop/message_pump_type.h"
 #include "base/run_loop.h"
@@ -73,7 +72,7 @@ void PostRepeatingDelayedTask() {
 int APP_SHIM_ENTRY_POINT_NAME(const app_mode::ChromeAppModeInfo* info) {
   base::CommandLine::Init(info->argc, info->argv);
 
-  base::mac::ScopedNSAutoreleasePool scoped_pool;
+  @autoreleasepool {
     base::AtExitManager exit_manager;
     chrome::RegisterPathProvider();
 
@@ -86,11 +85,11 @@ int APP_SHIM_ENTRY_POINT_NAME(const app_mode::ChromeAppModeInfo* info) {
     ChromeCrashReporterClient::Create();
     crash_reporter::InitializeCrashpad(true, "app_shim");
 
-  // Calculate the preferred locale used by Chrome.
-  // We can't use l10n_util::OverrideLocaleWithCocoaLocale() because it calls
-  // [base::mac::OuterBundle() preferredLocalizations] which gets localizations
-  // from the bundle of the running app (i.e. it is equivalent to
-  // [[NSBundle mainBundle] preferredLocalizations]) instead of the target
+    // Calculate the preferred locale used by Chrome. We can't use
+    // l10n_util::OverrideLocaleWithCocoaLocale() because it calls
+    // [base::mac::OuterBundle() preferredLocalizations] which gets
+    // localizations from the bundle of the running app (i.e. it is equivalent
+    // to [[NSBundle mainBundle] preferredLocalizations]) instead of the target
     // bundle.
     NSArray* preferred_languages = [NSLocale preferredLanguages];
     NSArray* supported_languages = [base::mac::OuterBundle() localizations];
@@ -125,7 +124,7 @@ int APP_SHIM_ENTRY_POINT_NAME(const app_mode::ChromeAppModeInfo* info) {
     // Launch the IO thread.
     base::Thread::Options io_thread_options;
     io_thread_options.message_pump_type = base::MessagePumpType::IO;
-  base::Thread *io_thread = new base::Thread("CrAppShimIO");
+    base::Thread* io_thread = new base::Thread("CrAppShimIO");
     io_thread->StartWithOptions(io_thread_options);
 
     mojo::core::Init();
@@ -138,7 +137,8 @@ int APP_SHIM_ENTRY_POINT_NAME(const app_mode::ChromeAppModeInfo* info) {
     [AppShimApplication sharedApplication];
     CHECK([NSApp isKindOfClass:[AppShimApplication class]]);
 
-  base::SingleThreadTaskExecutor main_task_executor(base::MessagePumpType::UI);
+    base::SingleThreadTaskExecutor main_task_executor(
+        base::MessagePumpType::UI);
     ui::WindowResizeHelperMac::Get()->Init(main_task_executor.task_runner());
     base::PlatformThread::SetName("CrAppShimMain");
 
@@ -163,4 +163,5 @@ int APP_SHIM_ENTRY_POINT_NAME(const app_mode::ChromeAppModeInfo* info) {
     AppShimController controller(controller_params);
     base::RunLoop().Run();
     return 0;
+  }
 }

chrome/browser/mac/install_from_dmg.mm

@@ -29,7 +29,6 @@
 #include "base/mac/scoped_authorizationref.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_ioobject.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 #include "base/stl_util.h"
@@ -407,18 +406,15 @@ DiskImageStatus IsAppRunningFromReadOnlyDiskImage(
 }
 
 bool MaybeInstallFromDiskImage() {
-  base::mac::ScopedNSAutoreleasePool autorelease_pool;
-
+  @autoreleasepool {
     std::string dmg_bsd_device_name;
     if (IsAppRunningFromReadOnlyDiskImage(&dmg_bsd_device_name) !=
         DiskImageStatusTrue) {
       return false;
     }
 
-  NSArray* application_directories =
-      NSSearchPathForDirectoriesInDomains(NSApplicationDirectory,
-                                          NSLocalDomainMask,
-                                          YES);
+    NSArray* application_directories = NSSearchPathForDirectoriesInDomains(
+        NSApplicationDirectory, NSLocalDomainMask, YES);
     if ([application_directories count] == 0) {
       LOG(ERROR) << "NSSearchPathForDirectoriesInDomains: "
                  << "no local application directories";
@@ -464,10 +460,8 @@ bool MaybeInstallFromDiskImage() {
     // authentication fails.  In either case, try to install without privilege
     // escalation.
 
-  if (!InstallFromDiskImage(authorization.release(),
-                            installer_path,
-                            source_path,
-                            target_path)) {
+    if (!InstallFromDiskImage(authorization.release(), installer_path,
+                              source_path, target_path)) {
       ShowErrorDialog();
       return false;
     }
@@ -485,6 +479,7 @@ bool MaybeInstallFromDiskImage() {
     }
 
     return true;
+  }
 }
 
 namespace {

chrome/browser/mac/keystone_glue.mm

@@ -18,7 +18,6 @@
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/sys_string_conversions.h"
@@ -111,9 +110,10 @@ class PerformBridge : public base::RefCountedThreadSafe<PerformBridge> {
 
   // Happens on a WorkerPool thread.
   void Run() {
-    base::mac::ScopedNSAutoreleasePool pool;
+    @autoreleasepool {
       [target_ performSelector:sel_ withObject:arg_];
     }
+  }
 
   base::scoped_nsobject<id> target_;
   SEL sel_;

chrome/browser/mac/relauncher.mm

@@ -23,7 +23,6 @@
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/mac/mac_logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
@@ -266,8 +265,7 @@ void RelauncherSynchronizeWithParent() {
 namespace internal {
 
 int RelauncherMain(const content::MainFunctionParams& main_parameters) {
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     // CommandLine rearranges the order of the arguments returned by
     // main_parameters.argv(), rendering it impossible to determine which
     // arguments originally came before kRelauncherArgSeparator and which came
@@ -346,7 +344,6 @@ int RelauncherMain(const content::MainFunctionParams& main_parameters) {
           relaunch_executable.assign(arg);
           seen_relaunch_executable = true;
         } else {
-
           NSString* arg_string = base::SysUTF8ToNSString(arg);
           if (!arg_string) {
             LOG(ERROR) << "base::SysUTF8ToNSString failed for " << arg;
@@ -362,7 +359,8 @@ int RelauncherMain(const content::MainFunctionParams& main_parameters) {
       return 1;
     }
 
-  // If an update is staged but not yet installed, wait for it to be installed.
+    // If an update is staged but not yet installed, wait for it to be
+    // installed.
     if (wait_for_staged_update) {
       base::scoped_nsobject<CrStagingKeyWatcher> watcher(
           [[CrStagingKeyWatcher alloc] initWithPollingTime:0.5]);
@@ -374,7 +372,7 @@ int RelauncherMain(const content::MainFunctionParams& main_parameters) {
     NSDictionary* configuration =
         @{NSWorkspaceLaunchConfigurationArguments : (relaunch_args.get())};
 
-  NSRunningApplication *application = [[NSWorkspace sharedWorkspace]
+    NSRunningApplication* application = [[NSWorkspace sharedWorkspace]
         launchApplicationAtURL:url
                        options:NSWorkspaceLaunchDefault |
                                NSWorkspaceLaunchWithErrorPresentation |
@@ -397,6 +395,7 @@ int RelauncherMain(const content::MainFunctionParams& main_parameters) {
     }
 
     return 0;
+  }
 }
 
 }  // namespace internal

chrome/common/chrome_paths_mac.mm

@@ -11,7 +11,6 @@
 #include "base/base_paths.h"
 #include "base/logging.h"
 #import "base/mac/foundation_util.h"
-#import "base/mac/scoped_nsautorelease_pool.h"
 #include "base/memory/free_deleter.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
@@ -24,8 +23,7 @@ namespace {
 // implementation of chrome::OuterAppBundle(), which should be the only
 // caller.
 NSBundle* OuterAppBundleInternal() {
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     if (!base::mac::AmIBundled()) {
       // If unbundled (as in a test), there's no app bundle.
       return nil;
@@ -42,14 +40,16 @@ NSBundle* OuterAppBundleInternal() {
     base::FilePath outer_app_dir =
         framework_path.DirName().DirName().DirName().DirName().DirName();
     const char* outer_app_dir_c = outer_app_dir.value().c_str();
-  NSString* outer_app_dir_ns = [NSString stringWithUTF8String:outer_app_dir_c];
+    NSString* outer_app_dir_ns =
+        [NSString stringWithUTF8String:outer_app_dir_c];
 
     return [[NSBundle bundleWithPath:outer_app_dir_ns] retain];
+  }
 }
 
 char* ProductDirNameForBundle(NSBundle* chrome_bundle) {
+  @autoreleasepool {
     const char* product_dir_name = NULL;
-  base::mac::ScopedNSAutoreleasePool pool;
 
     NSString* product_dir_name_ns =
         [chrome_bundle objectForInfoDictionaryKey:@"CrProductDirName"];
@@ -66,6 +66,7 @@ char* ProductDirNameForBundle(NSBundle* chrome_bundle) {
     // Leaked, but the only caller initializes a static with this result, so it
     // only happens once, and that's OK.
     return strdup(product_dir_name);
+  }
 }
 
 // ProductDirName returns the name of the directory inside

chrome/common/mac/launchd.mm

@@ -9,7 +9,6 @@
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/process/launch.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
@@ -100,7 +99,7 @@ bool Launchd::RestartJob(Domain domain,
                          Type type,
                          CFStringRef name,
                          CFStringRef cf_session_type) {
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     NSURL* url = GetPlistURL(domain, type, name);
     NSString* ns_path = [url path];
     ns_path = SanitizeShellArgument(ns_path);
@@ -116,8 +115,8 @@ bool Launchd::RestartJob(Domain domain,
     argv.push_back("/bin/bash");
     argv.push_back("--noprofile");
     argv.push_back("-c");
-  std::string command = base::StringPrintf(
-      "/bin/launchctl unload -S %s %s;"
+    std::string command =
+        base::StringPrintf("/bin/launchctl unload -S %s %s;"
                            "/bin/launchctl load -S %s %s;",
                            [ns_session_type UTF8String], file_path,
                            [ns_session_type UTF8String], file_path);
@@ -126,29 +125,32 @@ bool Launchd::RestartJob(Domain domain,
     base::LaunchOptions options;
     options.new_process_group = true;
     return base::LaunchProcess(argv, options).IsValid();
+  }
 }
 
 CFMutableDictionaryRef Launchd::CreatePlistFromFile(Domain domain,
                                                     Type type,
                                                     CFStringRef name) {
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     NSURL* ns_url = GetPlistURL(domain, type, name);
     NSMutableDictionary* plist =
         [[NSMutableDictionary alloc] initWithContentsOfURL:ns_url];
     return base::mac::NSToCFCast(plist);
+  }
 }
 
 bool Launchd::WritePlistToFile(Domain domain,
                                Type type,
                                CFStringRef name,
                                CFDictionaryRef dict) {
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     NSURL* ns_url = GetPlistURL(domain, type, name);
     return [base::mac::CFToNSCast(dict) writeToURL:ns_url atomically:YES];
+  }
 }
 
 bool Launchd::DeletePlist(Domain domain, Type type, CFStringRef name) {
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     NSURL* ns_url = GetPlistURL(domain, type, name);
     NSError* err = nil;
     if (![[NSFileManager defaultManager] removeItemAtPath:[ns_url path]
@@ -159,4 +161,5 @@ bool Launchd::DeletePlist(Domain domain, Type type, CFStringRef name) {
       return false;
     }
     return true;
+  }
 }

chrome/common/service_process_util_mac.mm

@@ -16,7 +16,6 @@
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
@@ -37,10 +36,11 @@ namespace {
 #define kServiceProcessSessionType "Aqua"
 
 CFStringRef CopyServiceProcessLaunchDName() {
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     NSBundle* bundle = base::mac::FrameworkBundle();
     return CFStringCreateCopy(kCFAllocatorDefault,
                               base::mac::NSToCFCast([bundle bundleIdentifier]));
+  }
 }
 
 NSString* GetServiceProcessLaunchDLabel() {
@@ -105,8 +105,9 @@ bool ForceServiceProcessShutdown(const std::string& /* version */,
 
 bool ServiceProcessState::GetServiceProcessData(std::string* version,
                                                 base::ProcessId* pid) {
-  base::mac::ScopedNSAutoreleasePool pool;
-  std::string label = base::SysNSStringToUTF8(GetServiceProcessLaunchDLabel());
+  @autoreleasepool {
+    std::string label =
+        base::SysNSStringToUTF8(GetServiceProcessLaunchDLabel());
     mac::services::JobInfo info;
     if (!Launchd::GetInstance()->GetJobInfo(label, &info))
       return false;
@@ -143,6 +144,7 @@ bool ServiceProcessState::GetServiceProcessData(std::string* version,
       *pid = info.pid ? *info.pid : -1;
     }
     return true;
+  }
 }
 
 bool ServiceProcessState::Initialize() {
@@ -211,17 +213,14 @@ mac::services::JobOptions GetServiceProcessJobOptions(
 
 CFDictionaryRef CreateServiceProcessLaunchdPlist(base::CommandLine* cmd_line,
                                                  bool for_auto_launch) {
-  base::mac::ScopedNSAutoreleasePool pool;
-
-  NSString* program =
-      base::SysUTF8ToNSString(cmd_line->GetProgram().value());
+  @autoreleasepool {
+    NSString* program = base::SysUTF8ToNSString(cmd_line->GetProgram().value());
 
     std::vector<std::string> args = cmd_line->argv();
     NSMutableArray* ns_args = [NSMutableArray arrayWithCapacity:args.size()];
 
     for (std::vector<std::string>::iterator iter = args.begin();
-       iter < args.end();
-       ++iter) {
+         iter < args.end(); ++iter) {
       [ns_args addObject:base::SysUTF8ToNSString(*iter)];
     }
 
@@ -239,7 +238,7 @@ CFDictionaryRef CreateServiceProcessLaunchdPlist(base::CommandLine* cmd_line,
       // relaunch the service automatically in any other case than exiting
       // cleanly with a 0 return code.
       NSDictionary* keep_alive =
-        @{ @LAUNCH_JOBKEY_KEEPALIVE_SUCCESSFULEXIT : @NO };
+          @{@LAUNCH_JOBKEY_KEEPALIVE_SUCCESSFULEXIT : @NO};
       NSDictionary* auto_launchd_plist = @{
         @LAUNCH_JOBKEY_RUNATLOAD : @YES,
         @LAUNCH_JOBKEY_KEEPALIVE : keep_alive,
@@ -248,6 +247,7 @@ CFDictionaryRef CreateServiceProcessLaunchdPlist(base::CommandLine* cmd_line,
       [launchd_plist addEntriesFromDictionary:auto_launchd_plist];
     }
     return reinterpret_cast<CFDictionaryRef>(launchd_plist);
+  }
 }
 
 // Writes the launchd property list into the user's LaunchAgents directory,
@@ -272,8 +272,7 @@ bool ServiceProcessState::RemoveFromAutoRun() {
 }
 
 bool ServiceProcessState::StateData::WatchExecutable() {
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     base::FilePath executable_path = base::FilePath(job_info.program);
     std::unique_ptr<ExecFilePathWatcherCallback> callback(
         new ExecFilePathWatcherCallback);
@@ -282,14 +281,14 @@ bool ServiceProcessState::StateData::WatchExecutable() {
       return false;
     }
     if (!executable_watcher.Watch(
-          executable_path,
-          false,
+            executable_path, false,
             base::Bind(&ExecFilePathWatcherCallback::NotifyPathChanged,
                        base::Owned(callback.release())))) {
       DLOG(ERROR) << "executable_watcher.watch " << executable_path.value();
       return false;
     }
     return true;
+  }
 }
 
 bool ExecFilePathWatcherCallback::Init(const base::FilePath& path) {
@@ -306,7 +305,7 @@ void ExecFilePathWatcherCallback::NotifyPathChanged(const base::FilePath& path,
     return;
   }
 
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     bool needs_shutdown = false;
     bool needs_restart = false;
     bool good_bundle = false;
@@ -315,8 +314,8 @@ void ExecFilePathWatcherCallback::NotifyPathChanged(const base::FilePath& path,
     NSURL* bundle_url = [[[executable_fsref_ URLByDeletingLastPathComponent]
         URLByDeletingLastPathComponent] URLByDeletingLastPathComponent];
     if (bundle_url) {
-    base::ScopedCFTypeRef<CFBundleRef> bundle(
-        CFBundleCreate(kCFAllocatorDefault, base::mac::NSToCFCast(bundle_url)));
+      base::ScopedCFTypeRef<CFBundleRef> bundle(CFBundleCreate(
+          kCFAllocatorDefault, base::mac::NSToCFCast(bundle_url)));
       good_bundle = CFBundleGetIdentifier(bundle) != NULL;
     }
 
@@ -355,8 +354,8 @@ void ExecFilePathWatcherCallback::NotifyPathChanged(const base::FilePath& path,
       base::ScopedCFTypeRef<CFStringRef> name(CopyServiceProcessLaunchDName());
       if (needs_restart) {
         base::ScopedCFTypeRef<CFMutableDictionaryRef> plist(
-          Launchd::GetInstance()->CreatePlistFromFile(
-              Launchd::User, Launchd::Agent, name));
+            Launchd::GetInstance()->CreatePlistFromFile(Launchd::User,
+                                                        Launchd::Agent, name));
         if (plist.get()) {
           NSMutableDictionary* ns_plist = base::mac::CFToNSCast(plist);
           NSURL* new_path = [executable_fsref_ filePathURL];
@@ -367,10 +366,8 @@ void ExecFilePathWatcherCallback::NotifyPathChanged(const base::FilePath& path,
               [ns_plist[@LAUNCH_JOBKEY_PROGRAMARGUMENTS] mutableCopy]);
           args[0] = ns_new_path;
           ns_plist[@LAUNCH_JOBKEY_PROGRAMARGUMENTS] = args;
-        if (!Launchd::GetInstance()->WritePlistToFile(Launchd::User,
-                                                      Launchd::Agent,
-                                                      name,
-                                                      plist)) {
+          if (!Launchd::GetInstance()->WritePlistToFile(
+                  Launchd::User, Launchd::Agent, name, plist)) {
             DLOG(ERROR) << "Unable to rewrite plist.";
             needs_shutdown = true;
           }
@@ -388,10 +385,8 @@ void ExecFilePathWatcherCallback::NotifyPathChanged(const base::FilePath& path,
       // Then deal with the process.
       CFStringRef session_type = CFSTR(kServiceProcessSessionType);
       if (needs_restart) {
-      if (!Launchd::GetInstance()->RestartJob(Launchd::User,
-                                              Launchd::Agent,
-                                              name,
-                                              session_type)) {
+        if (!Launchd::GetInstance()->RestartJob(Launchd::User, Launchd::Agent,
+                                                name, session_type)) {
           DLOG(ERROR) << "RestartLaunchdJob";
           needs_shutdown = true;
         }
@@ -406,4 +401,5 @@ void ExecFilePathWatcherCallback::NotifyPathChanged(const base::FilePath& path,
         }
       }
     }
+  }
 }

chrome/test/base/in_process_browser_test_mac.mm

@@ -4,7 +4,6 @@
 
 #include "chrome/test/base/in_process_browser_test.h"
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ -18,19 +17,18 @@ void InProcessBrowserTest::OpenDevToolsWindow(
     content::WebContents* web_contents) {
   // Opening a Devtools Window can cause AppKit to throw objects into the
   // autorelease pool. Flush the pool when this function returns.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     ASSERT_FALSE(content::DevToolsAgentHost::HasFor(web_contents));
     DevToolsWindow::OpenDevToolsWindow(web_contents);
     ASSERT_TRUE(content::DevToolsAgentHost::HasFor(web_contents));
+  }
 }
 
 Browser* InProcessBrowserTest::OpenURLOffTheRecord(Profile* profile,
                                                    const GURL& url) {
   // Opening an incognito window can cause AppKit to throw objects into the
   // autorelease pool. Flush the pool when this function returns.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     chrome::OpenURLOffTheRecord(profile, url);
     Browser* browser =
         chrome::FindTabbedBrowser(profile->GetOffTheRecordProfile(), false);
@@ -38,6 +36,7 @@ Browser* InProcessBrowserTest::OpenURLOffTheRecord(Profile* profile,
         browser->tab_strip_model()->GetActiveWebContents());
     observer.Wait();
     return browser;
+  }
 }
 
 // Creates a browser with a single tab (about:blank), waits for the tab to
@@ -45,18 +44,17 @@ Browser* InProcessBrowserTest::OpenURLOffTheRecord(Profile* profile,
 Browser* InProcessBrowserTest::CreateBrowser(Profile* profile) {
   // Making a browser window can cause AppKit to throw objects into the
   // autorelease pool. Flush the pool when this function returns.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     Browser* browser = new Browser(Browser::CreateParams(profile, true));
     AddBlankTabAndShow(browser);
     return browser;
+  }
 }
 
 Browser* InProcessBrowserTest::CreateIncognitoBrowser(Profile* profile) {
   // Making a browser window can cause AppKit to throw objects into the
   // autorelease pool. Flush the pool when this function returns.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     // Use active profile if default nullptr was passed.
     if (!profile)
       profile = browser()->profile();
@@ -66,27 +64,28 @@ Browser* InProcessBrowserTest::CreateIncognitoBrowser(Profile* profile) {
         Browser::CreateParams(profile->GetOffTheRecordProfile(), true));
     AddBlankTabAndShow(incognito);
     return incognito;
+  }
 }
 
 Browser* InProcessBrowserTest::CreateBrowserForPopup(Profile* profile) {
   // Making a browser window can cause AppKit to throw objects into the
   // autorelease pool. Flush the pool when this function returns.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     Browser* browser =
         new Browser(Browser::CreateParams(Browser::TYPE_POPUP, profile, true));
     AddBlankTabAndShow(browser);
     return browser;
+  }
 }
 
 Browser* InProcessBrowserTest::CreateBrowserForApp(const std::string& app_name,
                                                    Profile* profile) {
   // Making a browser window can cause AppKit to throw objects into the
   // autorelease pool. Flush the pool when this function returns.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     Browser* browser = new Browser(Browser::CreateParams::CreateForApp(
         app_name, false /* trusted_source */, gfx::Rect(), profile, true));
     AddBlankTabAndShow(browser);
     return browser;
+  }
 }

chrome/tools/build/mac/infoplist_strings_util.mm

@@ -17,7 +17,6 @@
 #include "base/files/file_util.h"
 #include "base/i18n/icu_util.h"
 #include "base/i18n/message_formatter.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
@@ -154,8 +153,7 @@ const char kAppType_Helper[] = "helper";  // Helper app
 }  // namespace
 
 int main(int argc, char* const argv[]) {
-  base::mac::ScopedNSAutoreleasePool autorelease_pool;
-
+  @autoreleasepool {
     const char* version_file_path = NULL;
     const char* grit_output_dir = NULL;
     const char* branding_strings_name = NULL;
@@ -338,4 +336,5 @@ int main(int argc, char* const argv[]) {
       }
     }
     return 0;
+  }
 }

components/history/core/test/thumbnail_ios.mm

@@ -7,24 +7,24 @@
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
-#import "base/mac/scoped_nsautorelease_pool.h"
 #include "components/history/core/test/thumbnail-inl.h"
 #include "ui/gfx/image/image.h"
 
 namespace history {
 
 gfx::Image CreateGoogleThumbnailForTest() {
-  base::mac::ScopedNSAutoreleasePool pool;
-  // -[NSData dataWithBytesNoCopy:length:freeWhenDone:] takes it first parameter
-  // as a void* but does not modify it (API is not const clean) so we need to
-  // use const_cast<> here.
-  NSData* data =
-      [NSData dataWithBytesNoCopy:const_cast<void*>(static_cast<const void*>(
-                                      kGoogleThumbnail))
+  @autoreleasepool {
+    // -[NSData dataWithBytesNoCopy:length:freeWhenDone:] takes its first
+    // parameter as a void* but does not modify it (API is not const clean) so
+    // we need to use const_cast<> here.
+    NSData* data = [NSData
+        dataWithBytesNoCopy:const_cast<void*>(
+                                static_cast<const void*>(kGoogleThumbnail))
                      length:sizeof(kGoogleThumbnail)
                freeWhenDone:NO];
     UIImage* image = [UIImage imageWithData:data scale:1];
     return gfx::Image([image retain]);
+  }
 }
 
 }  // namespace

components/update_client/updater_state_mac.mm

@@ -8,7 +8,6 @@
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/mac/foundation_util.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/version.h"
@@ -45,29 +44,28 @@ base::Time GetUpdaterSettingsTime(NSString* value_name) {
 }
 
 base::Version GetVersionFromPlist(const base::FilePath& info_plist) {
-  base::mac::ScopedNSAutoreleasePool scoped_pool;
-  NSData* data =
-      [NSData dataWithContentsOfFile:
-          base::mac::FilePathToNSString(info_plist)];
+  @autoreleasepool {
+    NSData* data = [NSData
+        dataWithContentsOfFile:base::mac::FilePathToNSString(info_plist)];
     if ([data length] == 0) {
       return base::Version();
     }
-  NSDictionary* all_keys = base::mac::ObjCCastStrict<NSDictionary>(
-      [NSPropertyListSerialization propertyListWithData:data
+    NSDictionary* all_keys =
+        base::mac::ObjCCastStrict<NSDictionary>([NSPropertyListSerialization
+            propertyListWithData:data
                          options:NSPropertyListImmutable
                           format:nil
                            error:nil]);
     if (all_keys == nil) {
       return base::Version();
     }
-  CFStringRef version =
-      base::mac::GetValueFromDictionary<CFStringRef>(
-          base::mac::NSToCFCast(all_keys),
-          kCFBundleVersionKey);
+    CFStringRef version = base::mac::GetValueFromDictionary<CFStringRef>(
+        base::mac::NSToCFCast(all_keys), kCFBundleVersionKey);
     if (version == NULL) {
       return base::Version();
     }
     return base::Version(base::SysCFStringRefToUTF8(version));
+  }
 }
 
 }  // namespace

content/browser/renderer_host/input/synthetic_gesture_target_mac.mm

@@ -4,7 +4,6 @@
 
 #include "content/browser/renderer_host/input/synthetic_gesture_target_mac.h"
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_input_event_router.h"
 #import "content/app_shim_remote_cocoa/render_widget_host_view_cocoa.h"
@@ -88,13 +87,12 @@ void SyntheticGestureTargetMac::DispatchWebGestureEventToPlatform(
     const ui::LatencyInfo& latency_info) {
   // Create an autorelease pool so that we clean up any synthetic events we
   // generate.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     NSPoint content_local = NSMakePoint(
         web_gesture.PositionInWidget().x,
         [cocoa_view_ frame].size.height - web_gesture.PositionInWidget().y);
-  NSPoint location_in_window =
-      [cocoa_view_ convertPoint:content_local toView:nil];
+    NSPoint location_in_window = [cocoa_view_ convertPoint:content_local
+                                                    toView:nil];
 
     switch (web_gesture.GetType()) {
       case WebInputEvent::kGesturePinchBegin: {
@@ -125,6 +123,7 @@ void SyntheticGestureTargetMac::DispatchWebGestureEventToPlatform(
       default:
         NOTREACHED();
     }
+  }
 }
 
 void SyntheticGestureTargetMac::DispatchWebTouchEventToPlatform(

content/browser/renderer_host/pepper/pepper_truetype_font_list_mac.mm

@@ -6,7 +6,6 @@
 
 #import <Cocoa/Cocoa.h>
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/stl_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ppapi/c/dev/ppb_truetype_font_dev.h"
@@ -36,18 +35,19 @@ const NSInteger kPepperFontWeightsLength = base::size(kPepperFontWeights);
 }  // namespace
 
 void GetFontFamilies_SlowBlocking(std::vector<std::string>* font_families) {
-  base::mac::ScopedNSAutoreleasePool autorelease_pool;
+  @autoreleasepool {
     NSFontManager* fontManager = [[[NSFontManager alloc] init] autorelease];
     NSArray* fonts = [fontManager availableFontFamilies];
     font_families->reserve([fonts count]);
     for (NSString* family_name in fonts)
       font_families->push_back(base::SysNSStringToUTF8(family_name));
+  }
 }
 
 void GetFontsInFamily_SlowBlocking(
     const std::string& family,
     std::vector<ppapi::proxy::SerializedTrueTypeFontDesc>* fonts_in_family) {
-  base::mac::ScopedNSAutoreleasePool autorelease_pool;
+  @autoreleasepool {
     NSFontManager* fontManager = [[[NSFontManager alloc] init] autorelease];
     NSString* ns_family = base::SysUTF8ToNSString(family);
     NSArray* ns_fonts_in_family =
@@ -78,6 +78,7 @@ void GetFontsInFamily_SlowBlocking(
 
       fonts_in_family->push_back(desc);
     }
+  }
 }
 
 }  // namespace content

content/browser/renderer_host/render_widget_host_view_mac_editcommand_helper_unittest.mm

@@ -140,8 +140,7 @@ TEST_F(RenderWidgetHostViewMacEditCommandHelperWithTaskEnvTest,
   supported_factors.push_back(ui::SCALE_FACTOR_100P);
   ui::test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     int32_t routing_id = process_host->GetNextRoutingID();
     mojom::WidgetPtr widget;
     std::unique_ptr<MockWidgetImpl> widget_impl =
@@ -153,8 +152,8 @@ TEST_F(RenderWidgetHostViewMacEditCommandHelperWithTaskEnvTest,
     ui::WindowResizeHelperMac::Get()->Init(base::ThreadTaskRunnerHandle::Get());
 
     // Owned by its |GetInProcessNSView()|, i.e. |rwhv_cocoa|.
-  RenderWidgetHostViewMac* rwhv_mac = new RenderWidgetHostViewMac(
-      render_widget, false);
+    RenderWidgetHostViewMac* rwhv_mac =
+        new RenderWidgetHostViewMac(render_widget, false);
     base::scoped_nsobject<RenderWidgetHostViewCocoa> rwhv_cocoa(
         [rwhv_mac->GetInProcessNSView() retain]);
 
@@ -168,16 +167,17 @@ TEST_F(RenderWidgetHostViewMacEditCommandHelperWithTaskEnvTest,
 
     for (NSString* edit_command_name in edit_command_strings) {
       NSString* sel_str = [edit_command_name stringByAppendingString:@":"];
-    [rwhwvm_owner performSelector:NSSelectorFromString(sel_str) withObject:nil];
+      [rwhwvm_owner performSelector:NSSelectorFromString(sel_str)
+                         withObject:nil];
     }
 
     size_t num_edit_commands = [edit_command_strings count];
     EXPECT_EQ(delegate.edit_command_message_count_, num_edit_commands);
     rwhv_cocoa.reset();
-  pool.Recycle();
 
     // The |render_widget|'s process needs to be deleted within |message_loop|.
     delete render_widget;
+  }
 
   ui::WindowResizeHelperMac::Get()->ShutdownForTests();
 }

content/common/font_list_mac.mm

@@ -8,14 +8,13 @@
 
 #include <utility>
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/values.h"
 
 namespace content {
 
 std::unique_ptr<base::ListValue> GetFontList_SlowBlocking() {
-  base::mac::ScopedNSAutoreleasePool autorelease_pool;
+  @autoreleasepool {
     std::unique_ptr<base::ListValue> font_list(new base::ListValue);
     NSFontManager* fontManager = [[[NSFontManager alloc] init] autorelease];
     NSMutableDictionary* fonts_dict = [NSMutableDictionary dictionary];
@@ -40,6 +39,7 @@ std::unique_ptr<base::ListValue> GetFontList_SlowBlocking() {
     }
 
     return font_list;
+  }
 }
 
 }  // namespace content

printing/printing_context_mac.mm

@@ -12,7 +12,6 @@
 
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ -87,13 +86,12 @@ void PrintingContextMac::AskUserForSettings(int max_pages,
                                             PrintSettingsCallback callback) {
   // Exceptions can also happen when the NSPrintPanel is being
   // deallocated, so it must be autoreleased within this scope.
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     DCHECK([NSThread isMainThread]);
 
     // We deliberately don't feed max_pages into the dialog, because setting
-  // NSPrintLastPage makes the print dialog pre-select the option to only print
-  // a range.
+    // NSPrintLastPage makes the print dialog pre-select the option to only
+    // print a range.
 
     // TODO(stuartmorgan): implement 'print selection only' (probably requires
     // adding a new custom view to the panel on 10.5; 10.6 has
@@ -124,8 +122,8 @@ void PrintingContextMac::AskUserForSettings(int max_pages,
 
     // This function may be called in the middle of a CATransaction, where
     // running a modal panel is forbidden. That situation isn't ideal, but from
-  // this code's POV the right answer is to defer running the panel until after
-  // the current transaction. See https://crbug.com/849538.
+    // this code's POV the right answer is to defer running the panel until
+    // after the current transaction. See https://crbug.com/849538.
     __block auto block_callback = std::move(callback);
     [CATransaction setCompletionBlock:^{
       NSInteger selection = [panel runModalWithPrintInfo:printInfo];
@@ -138,6 +136,7 @@ void PrintingContextMac::AskUserForSettings(int max_pages,
         std::move(block_callback).Run(CANCEL);
       }
     }];
+  }
 }
 
 gfx::Size PrintingContextMac::GetPdfPaperSizeDeviceUnits() {

remoting/base/breakpad_mac.mm

@@ -7,22 +7,20 @@
 #include <Foundation/Foundation.h>
 
 #include "base/logging.h"
-#import "base/mac/scoped_nsautorelease_pool.h"
 #import "third_party/breakpad/breakpad/src/client/mac/Framework/Breakpad.h"
 
 namespace remoting {
 
 void InitializeCrashReporting() {
-  base::mac::ScopedNSAutoreleasePool autorelease_pool;
-
+  @autoreleasepool {
     NSBundle* main_bundle = [NSBundle mainBundle];
 
     // Tell Breakpad where crash_inspector and crash_report_sender are.
     NSString* resource_path = [main_bundle resourcePath];
     NSString* inspector_location =
         [resource_path stringByAppendingPathComponent:@"crash_inspector"];
-  NSString* reporter_bundle_location =
-      [resource_path stringByAppendingPathComponent:@"crash_report_sender.app"];
+    NSString* reporter_bundle_location = [resource_path
+        stringByAppendingPathComponent:@"crash_report_sender.app"];
     NSString* reporter_location =
         [[NSBundle bundleWithPath:reporter_bundle_location] executablePath];
 
@@ -46,14 +44,12 @@ void InitializeCrashReporting() {
       // service that shouldn't rely on a console user to dismiss any prompt.
       // Also, this may be running in the LoginWindow context, where prompting
       // might not be possible.
-    [breakpad_config setObject:@"YES"
-                        forKey:@BREAKPAD_SKIP_CONFIRM];
+      [breakpad_config setObject:@"YES" forKey:@BREAKPAD_SKIP_CONFIRM];
     }
     if (![breakpad_config objectForKey:@BREAKPAD_REPORT_INTERVAL]) {
       // Set a minimum 6-hour interval between crash-reports, to match the
       // throttling used on Windows.
-    [breakpad_config setObject:@"21600"
-                        forKey:@BREAKPAD_REPORT_INTERVAL];
+      [breakpad_config setObject:@"21600" forKey:@BREAKPAD_REPORT_INTERVAL];
     }
     if (![breakpad_config objectForKey:@BREAKPAD_URL]) {
       [breakpad_config setObject:@"https://clients2.google.com/cr/report"
@@ -63,6 +59,7 @@ void InitializeCrashReporting() {
     if (!BreakpadCreate(breakpad_config)) {
       LOG(ERROR) << "Breakpad initialization failed";
     }
+  }
 }
 
 }  // namespace remoting

remoting/host/continue_window_mac.mm

@@ -10,7 +10,6 @@
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/strings/sys_string_conversions.h"
@@ -62,17 +61,19 @@ ContinueWindowMac::~ContinueWindowMac() {
 void ContinueWindowMac::ShowUi() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     controller_.reset(
         [[ContinueWindowMacController alloc] initWithWindow:this]);
     [controller_ show];
+  }
 }
 
 void ContinueWindowMac::HideUi() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     [controller_ hide];
+  }
 }
 
 // static

remoting/host/it2me/it2me_confirmation_dialog_mac.mm

@@ -14,7 +14,6 @@
 #include "base/callback.h"
 #include "base/i18n/message_formatter.h"
 #include "base/location.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/strings/sys_string_conversions.h"
@@ -76,9 +75,10 @@ It2MeConfirmationDialogMac::~It2MeConfirmationDialogMac() {
   dialog_timer_.Stop();
 
   if (controller_) {
-    base::mac::ScopedNSAutoreleasePool pool;
+    @autoreleasepool {
       [controller_ hide];
     }
+  }
 }
 
 void It2MeConfirmationDialogMac::Show(const std::string& remote_user_email,
@@ -92,21 +92,23 @@ void It2MeConfirmationDialogMac::Show(const std::string& remote_user_email,
   ResultCallback dialog_action_callback = base::Bind(
       &It2MeConfirmationDialogMac::OnDialogAction, base::Unretained(this));
 
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     controller_.reset([[It2MeConfirmationDialogMacController alloc]
         initWithCallback:dialog_action_callback
                 username:remote_user_email]);
     [controller_ show];
+  }
 }
 
 void It2MeConfirmationDialogMac::OnDialogAction(Result result) {
   dialog_timer_.Stop();
 
   if (controller_) {
-    base::mac::ScopedNSAutoreleasePool pool;
+    @autoreleasepool {
       [controller_ hide];
       controller_.reset();
     }
+  }
 
   if (result_callback_) {
     std::move(result_callback_).Run(result);

rlz/mac/lib/rlz_value_store_mac.mm

@@ -353,15 +353,15 @@ RlzValueStore* ScopedRlzValueStoreLock::GetStore() {
 namespace testing {
 
 void SetRlzStoreDirectory(const base::FilePath& directory) {
-  base::mac::ScopedNSAutoreleasePool pool;
-
+  @autoreleasepool {
     [g_test_folder release];
     if (directory.empty()) {
       g_test_folder = nil;
     } else {
       // Not Unsafe on OS X.
-    g_test_folder =
-      [[NSString alloc] initWithUTF8String:directory.AsUTF8Unsafe().c_str()];
+      g_test_folder = [[NSString alloc]
+          initWithUTF8String:directory.AsUTF8Unsafe().c_str()];
+    }
   }
 }
 

services/device/geolocation/wifi_data_provider_mac.mm

@@ -13,7 +13,6 @@
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
 
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ -45,10 +44,10 @@ class CoreWlanApi : public WifiDataProviderCommon::WlanApiInterface {
 };
 
 bool CoreWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) {
-  base::mac::ScopedNSAutoreleasePool auto_pool;
-  // Initialize the scan parameters with scan key merging disabled, so we get
+  @autoreleasepool {  // Initialize the scan parameters with scan key merging
+                      // disabled, so we get
     // every AP listed in the scan without any SSID de-duping logic.
-  NSDictionary* params = @{ kCWScanKeyMerge : @NO };
+    NSDictionary* params = @{kCWScanKeyMerge : @NO};
 
     NSSet* supported_interfaces = [CWInterface interfaceNames];
     NSUInteger interface_error_count = 0;
@@ -64,8 +63,8 @@ bool CoreWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) {
       const base::TimeTicks start_time = base::TimeTicks::Now();
 
       NSError* err = nil;
-    NSArray* scan =
-        [corewlan_interface scanForNetworksWithParameters:params error:&err];
+      NSArray* scan = [corewlan_interface scanForNetworksWithParameters:params
+                                                                  error:&err];
       const int error_code = [err code];
       const int count = [scan count];
       // We could get an error code but count != 0 if the scan was interrupted,
@@ -90,13 +89,14 @@ bool CoreWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) {
         AccessPointData access_point_data;
         // -[CWNetwork bssid] uses colons to separate the components of the MAC
         // address, but AccessPointData requires they be separated with a dash.
-      access_point_data.mac_address = base::SysNSStringToUTF16([[network bssid]
-          stringByReplacingOccurrencesOfString:@":"
+        access_point_data.mac_address = base::SysNSStringToUTF16(
+            [[network bssid] stringByReplacingOccurrencesOfString:@":"
                                                        withString:@"-"]);
         access_point_data.radio_signal_strength = [network rssiValue];
         access_point_data.channel = [[network wlanChannel] channelNumber];
         access_point_data.signal_to_noise =
-          access_point_data.radio_signal_strength - [network noiseMeasurement];
+            access_point_data.radio_signal_strength -
+            [network noiseMeasurement];
         access_point_data.ssid = base::SysNSStringToUTF16([network ssid]);
         data->insert(access_point_data);
       }
@@ -110,6 +110,7 @@ bool CoreWlanApi::GetAccessPointData(WifiData::AccessPointDataSet* data) {
     // one interface did not fail.
     return interface_error_count == 0 ||
            [supported_interfaces count] > interface_error_count;
+  }
 }
 
 // The time periods, in milliseconds, between successive polls of the wifi data.

services/service_manager/sandbox/mac/sandbox_mac.mm

@@ -26,7 +26,6 @@
 #include "base/mac/mac_util.h"
 #include "base/mac/mach_port_rendezvous.h"
 #include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/rand_util.h"
 #include "base/stl_util.h"
@@ -83,8 +82,7 @@ const char* SandboxMac::kSandboxBundleVersionPath = "BUNDLE_VERSION_PATH";
 void SandboxMac::Warmup(SandboxType sandbox_type) {
   DCHECK_EQ(sandbox_type, SANDBOX_TYPE_GPU);
 
-  base::mac::ScopedNSAutoreleasePool scoped_pool;
-
+  @autoreleasepool {
     {  // CGColorSpaceCreateWithName(), CGBitmapContextCreate() - 10.5.6
       base::ScopedCFTypeRef<CGColorSpaceRef> rgb_colorspace(
           CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
@@ -109,7 +107,8 @@ void SandboxMac::Warmup(SandboxType sandbox_type) {
       localtime(&tv);
     }
 
-  {  // Gestalt() tries to read /System/Library/CoreServices/SystemVersion.plist
+    {  // Gestalt() tries to read
+       // /System/Library/CoreServices/SystemVersion.plist
       // on 10.5.6
       int32_t tmp;
       base::SysInfo::OperatingSystemVersionNumbers(&tmp, &tmp, &tmp);
@@ -134,6 +133,7 @@ void SandboxMac::Warmup(SandboxType sandbox_type) {
       // Needed by zero-copy texture update framework - crbug.com/323338
       base::ScopedCFTypeRef<IOSurfaceRef> io_surface(IOSurfaceLookup(0));
     }
+  }
 }
 
 // Load the appropriate template for the given sandbox type.

ui/base/test/cocoa_helper.mm

@@ -212,8 +212,7 @@ void CocoaTest::TearDown() {
           ([start_date timeIntervalSinceNow] > -kCloseTimeoutSeconds);
 
       // Autorelease anything thrown up by the event loop.
-      {
-        base::mac::ScopedNSAutoreleasePool pool;
+      @autoreleasepool {
         ++spins;
         NSEvent* next_event = [NSApp nextEventMatchingMask:NSAnyEventMask
                                                  untilDate:nil
@@ -253,12 +252,13 @@ std::set<NSWindow*> CocoaTest::ApplicationWindows() {
 
   // Must create a pool here because [NSApp windows] has created an array
   // with retains on all the windows in it.
-  base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     NSArray* appWindows = [NSApp windows];
     for (NSWindow* window in appWindows) {
       windows.insert(window);
     }
     return windows;
+  }
 }
 
 std::set<NSWindow*> CocoaTest::WindowsLeft() {

ui/views/controls/native/native_view_host_mac_unittest.mm

@@ -8,7 +8,6 @@
 
 #include <memory>
 
-#import "base/mac/scoped_nsautorelease_pool.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #import "testing/gtest_mac.h"
@@ -220,8 +219,7 @@ TEST_F(NativeViewHostMacTest, NativeViewHidden) {
 // Check that we can destroy cleanly even if the native view has already been
 // released.
 TEST_F(NativeViewHostMacTest, NativeViewReleased) {
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     CreateHost();
     // In practice the native view is a WebContentsViewCocoa which is retained
     // by its superview (a TabContentsContainerView) and by WebContentsViewMac.

ui/views/test/views_test_helper_mac.mm

@@ -7,7 +7,6 @@
 #import <Cocoa/Cocoa.h>
 
 #include "base/bind.h"
-#import "base/mac/scoped_nsautorelease_pool.h"
 #include "ui/base/test/scoped_fake_full_keyboard_access.h"
 #include "ui/base/test/scoped_fake_nswindow_focus.h"
 #include "ui/base/test/scoped_fake_nswindow_fullscreen.h"
@@ -63,13 +62,14 @@ void ViewsTestHelperMac::TearDown() {
   // this is handled automatically by views::Widget::CloseAllSecondaryWidgets().
   // Unit tests on Aura may create Widgets owned by a RootWindow that gets torn
   // down, but on Mac we need to be more explicit.
-  base::mac::ScopedNSAutoreleasePool pool;  // Ensure the NSArray is released.
+  @autoreleasepool {
     NSArray* native_windows = [NSApp windows];
     for (NSWindow* window : native_windows)
       DCHECK(!Widget::GetWidgetForNativeWindow(window)) << "Widget not closed.";
 
     ui::test::EventGeneratorDelegate::SetFactoryFunction(
         ui::test::EventGeneratorDelegate::FactoryFunction());
+  }
 }
 
 }  // namespace views

ui/views/widget/native_widget_mac_unittest.mm

@@ -10,7 +10,6 @@
 #include "base/callback.h"
 #import "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
-#import "base/mac/scoped_nsautorelease_pool.h"
 #import "base/mac/scoped_nsobject.h"
 #import "base/mac/scoped_objc_class_swizzler.h"
 #include "base/macros.h"
@@ -817,10 +816,9 @@ TEST_F(NativeWidgetMacTest, NonWidgetParent) {
 TEST_F(NativeWidgetMacTest, CloseAllSecondaryWidgetsValidState) {
   NativeWidgetMacTestWindow* last_window = nil;
   bool window_deallocated = false;
-  {
+  @autoreleasepool {
     // First verify the behavior of CloseAllSecondaryWidgets in the normal case,
     // and how [NSApp windows] changes in response to Widget closure.
-    base::mac::ScopedNSAutoreleasePool pool;
     Widget* widget = CreateWidgetWithTestWindow(
         Widget::InitParams(Widget::InitParams::TYPE_WINDOW), &last_window);
     last_window.deallocFlag = &window_deallocated;
@@ -833,10 +831,9 @@ TEST_F(NativeWidgetMacTest, CloseAllSecondaryWidgetsValidState) {
   EXPECT_TRUE(window_deallocated);
   window_deallocated = false;
 
-  {
+  @autoreleasepool {
     // Repeat, but now retain a reference and close the window before
     // CloseAllSecondaryWidgets().
-    base::mac::ScopedNSAutoreleasePool pool;
     Widget* widget = CreateWidgetWithTestWindow(
         Widget::InitParams(Widget::InitParams::TYPE_WINDOW), &last_window);
     last_window.deallocFlag = &window_deallocated;
@@ -847,8 +844,7 @@ TEST_F(NativeWidgetMacTest, CloseAllSecondaryWidgetsValidState) {
   }
 
   EXPECT_FALSE(window_deallocated);
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     Widget::CloseAllSecondaryWidgets();
     [last_window release];
   }
@@ -880,8 +876,7 @@ TEST_F(NativeWidgetMacTest, NonWidgetParentLastReference) {
   bool child_dealloced = false;
   bool native_parent_dealloced = false;
   NativeWidgetMacTestWindow* native_parent = nil;
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     native_parent = MakeBorderlessNativeParent();
     [native_parent setDeallocFlag:&native_parent_dealloced];
 
@@ -893,13 +888,12 @@ TEST_F(NativeWidgetMacTest, NonWidgetParentLastReference) {
     CreateWidgetWithTestWindow(std::move(init_params), &window);
     [window setDeallocFlag:&child_dealloced];
   }
-  {
+  @autoreleasepool {
     // On 10.11, closing a weak reference on the parent window works, but older
     // versions of AppKit get upset if things are released inside -[NSWindow
     // close]. This test tries to establish a situation where the last reference
     // to the child window is released inside WidgetOwnerNSWindowAdapter::
     // OnWindowWillClose().
-    base::mac::ScopedNSAutoreleasePool pool;
     [native_parent close];
     EXPECT_TRUE(child_dealloced);
   }
@@ -1511,8 +1505,7 @@ TEST_F(NativeWidgetMacTest, CloseWithWindowModalSheet) {
 
   // Test another hypothetical: What if -sheetDidEnd: was invoked somehow
   // without going through [NSApp endSheet:] or -[NSWindow endSheet:].
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     Widget* sheet_widget = ShowWindowModalWidget(native_parent);
     NSWindow* sheet_window =
         sheet_widget->GetNativeWindow().GetNativeNSWindow();
@@ -1548,8 +1541,7 @@ TEST_F(NativeWidgetMacTest, CloseWithWindowModalSheet) {
 // https://crbug.com/851376.
 TEST_F(NativeWidgetMacTest, CloseWindowModalSheetWithoutSheetParent) {
   NSWindow* native_parent = MakeClosableTitledNativeParent();
-  {
-    base::mac::ScopedNSAutoreleasePool pool;
+  @autoreleasepool {
     Widget* sheet_widget = ShowWindowModalWidget(native_parent);
     NSWindow* sheet_window =
         sheet_widget->GetNativeWindow().GetNativeNSWindow();