Makes a couple of tests reset state appropriately

A couple of tests were setting the ScreenTypeDelegate or Screen during
Setup but never resetting during Teardown. This lead to future tests
failing.

BUG=448189
TEST=covered by tests
R=sadrul@chromium.org

Review URL: https://codereview.chromium.org/857283002

Cr-Commit-Position: refs/heads/master@{#312268}

chrome/browser/signin/signin_error_notifier_ash_unittest.cc

@@ -80,7 +80,7 @@ class SigninErrorNotifierTest : public AshTestBase {
 #if defined(OS_WIN)
     test_screen_.reset(aura::TestScreen::Create(gfx::Size()));
     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, test_screen_.get());
-    gfx::Screen::SetScreenTypeDelegate(new ScreenTypeDelegateDesktop);
+    gfx::Screen::SetScreenTypeDelegate(&screen_type_delegate_);
 #endif
 
     error_controller_ = SigninErrorControllerFactory::GetForProfile(
@@ -91,6 +91,8 @@ class SigninErrorNotifierTest : public AshTestBase {
 
   void TearDown() override {
 #if defined(OS_WIN)
+    gfx::Screen::SetScreenTypeDelegate(nullptr);
+    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
     test_screen_.reset();
 #endif
     profile_manager_.reset();
@@ -109,6 +111,7 @@ class SigninErrorNotifierTest : public AshTestBase {
   }
 
 #if defined(OS_WIN)
+  ScreenTypeDelegateDesktop screen_type_delegate_;
   scoped_ptr<gfx::Screen> test_screen_;
 #endif
   scoped_ptr<TestingProfileManager> profile_manager_;

chrome/browser/sync/sync_error_notifier_ash_unittest.cc

@@ -108,7 +108,7 @@ class SyncErrorNotifierTest : public AshTestBase  {
 #if defined(OS_WIN)
     test_screen_.reset(aura::TestScreen::Create(gfx::Size()));
     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, test_screen_.get());
-    gfx::Screen::SetScreenTypeDelegate(new ScreenTypeDelegateDesktop);
+    gfx::Screen::SetScreenTypeDelegate(&screen_type_delegate_);
 #endif
 
     service_.reset(new NiceMock<ProfileSyncServiceMock>(profile_));
@@ -129,6 +129,8 @@ class SyncErrorNotifierTest : public AshTestBase  {
     error_notifier_->Shutdown();
     service_.reset();
 #if defined(OS_WIN)
+    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
+    gfx::Screen::SetScreenTypeDelegate(nullptr);
     test_screen_.reset();
 #endif
     profile_manager_.reset();
@@ -166,6 +168,7 @@ class SyncErrorNotifierTest : public AshTestBase  {
   }
 
 #if defined(OS_WIN)
+  ScreenTypeDelegateDesktop screen_type_delegate_;
   scoped_ptr<gfx::Screen> test_screen_;
 #endif
   scoped_ptr<TestingProfileManager> profile_manager_;

chrome/test/base/view_event_test_platform_part_ash.cc

@@ -4,6 +4,7 @@
 
 #include "chrome/test/base/view_event_test_platform_part.h"
 
+#include "base/memory/scoped_ptr.h"
 #include "ui/aura/env.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/widget/desktop_aura/desktop_screen.h"
@@ -24,23 +25,25 @@ class ViewEventTestPlatformPartAsh : public ViewEventTestPlatformPart {
   }
 
  private:
+  scoped_ptr<gfx::Screen> screen_;
   wm::WMState wm_state_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewEventTestPlatformPartAsh);
 };
 
 ViewEventTestPlatformPartAsh::ViewEventTestPlatformPartAsh(
-    ui::ContextFactory* context_factory) {
+    ui::ContextFactory* context_factory)
+    : screen_(views::CreateDesktopScreen()) {
   // http://crbug.com/154081 use ash::Shell code path below on win_ash bots when
   // interactive_ui_tests is brought up on that platform.
-  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
-                                 views::CreateDesktopScreen());
+  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
   aura::Env::CreateInstance(true);
   aura::Env::GetInstance()->set_context_factory(context_factory);
 }
 
 ViewEventTestPlatformPartAsh::~ViewEventTestPlatformPartAsh() {
   aura::Env::DeleteInstance();
+  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
 }
 
 }  // namespace

content/browser/renderer_host/input/touch_emulator_unittest.cc

@@ -62,6 +62,7 @@ class TouchEmulatorTest : public testing::Test,
 
 #if defined(USE_AURA)
     aura::Env::DeleteInstance();
+    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
     screen_.reset();
 #endif
   }

content/browser/renderer_host/render_widget_host_unittest.cc

@@ -458,6 +458,7 @@ class RenderWidgetHostTest : public testing::Test {
 
 #if defined(USE_AURA)
     aura::Env::DeleteInstance();
+    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
     screen_.reset();
 #endif
 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))

tools/valgrind/drmemory/suppressions.txt

@@ -705,19 +705,6 @@ content.dll!base::internal::BindState<>::`scalar deleting destructor'
 base.dll!scoped_refptr<>::Release
 base.dll!base::internal::CallbackBase::~CallbackBase
 
-UNADDRESSABLE ACCESS
-name=https://crbug.com/448189
-...
-aura.dll!aura::GetDeviceScaleFactorFromDisplay
-aura.dll!aura::WindowTreeHost::InitCompositor
-aura.dll!aura::WindowTreeHost::InitHost
-ash.dll!ash::DisplayController::AddWindowTreeHostForDisplay
-ash.dll!ash::DisplayController::CreatePrimaryHost
-ash.dll!ash::Shell::Init
-ash.dll!ash::Shell::CreateInstance
-*!ash::test::AshTestHelper::SetUp
-*!ash::test::AshTestBase::SetUp
-
 HANDLE LEAK
 name=http://crbug.com/449989
 system call NtOpenProcess

tools/valgrind/gtest_exclude/unit_tests.gtest-drmemory_win32.txt

@@ -79,7 +79,3 @@ TranslateManagerRenderViewHostTest.*
 SafeBrowsingModuleVerifierWinTest.VerifyModuleExportModified
 SafeBrowsingModuleVerifierWinTest.VerifyModuleModified
 SafeBrowsingModuleVerifierWinTest.VerifyModuleUnmodified
-
-# http://crbug.com/448189
-AXTreeSourceAshTest.*
-ChromeScreenshotGrabberTest.TakeScreenshot

ui/gfx/screen.h

@@ -37,6 +37,8 @@ class GFX_EXPORT Screen {
 
   // Sets the global screen for a particular screen type. Only the _NATIVE
   // ScreenType must be provided.
+  // NOTE: this does not take ownership of |screen|. Tests must be sure to
+  // reset any state they install.
   static void SetScreenInstance(ScreenType type, Screen* instance);
 
   // Returns the global screen for a particular type. Types other than _NATIVE
@@ -45,6 +47,8 @@ class GFX_EXPORT Screen {
 
   // Sets the global ScreenTypeDelegate. May be left unset if the platform
   // uses only the _NATIVE ScreenType.
+  // NOTE: this does not take ownership of |delegate|. Tests must be sure to
+  // reset any state they install.
   static void SetScreenTypeDelegate(ScreenTypeDelegate* delegate);
 
   Screen();