v8: Remove obsolete V8 extras flag

Bug: chromium:920347
Tbr: avi@chromium.org,rdevlin.cronin@chromium.org,mmenke@chromium.org,thestig@chromium.org
Change-Id: I6334a195d4804e07563c9a61fe771e005234b134
Reviewed-on: https://chromium-review.googlesource.com/c/1404554
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621611}

AUTHORS

@@ -683,6 +683,7 @@ Peter Collingbourne <peter@pcc.me.uk>
 Peter Gal <pgal.u-szeged@partner.samsung.com>
 Peter Molnar <pmolnar.u-szeged@partner.samsung.com>
 Peter Snyder <snyderp@gmail.com>
+Peter Wong <peter.wm.wong@gmail.com>
 Philip Hanson <philip.hanson@intel.com>
 Philipp Hancke <fippo@andyet.net>
 Philipp Hancke <philipp.hancke@googlemail.com>

content/test/fuzzer/fuzzer_support.cc

@@ -42,7 +42,6 @@ Env::Env() {
   gin::V8Initializer::LoadV8Natives();
 #endif
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                 gin::IsolateHolder::kStableV8Extras,
                                  gin::ArrayBufferAllocator::SharedInstance());
 
   adapter = std::make_unique<RenderViewTestAdapter>();

extensions/renderer/bindings/api_binding_test.cc

@@ -30,7 +30,6 @@ void APIBindingTest::SetUp() {
 #endif
 
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                 gin::IsolateHolder::kStableV8Extras,
                                  gin::ArrayBufferAllocator::SharedInstance());
 
   isolate_holder_ = std::make_unique<gin::IsolateHolder>(

gin/isolate_holder.cc

@@ -119,11 +119,10 @@ IsolateHolder::~IsolateHolder() {
 
 // static
 void IsolateHolder::Initialize(ScriptMode mode,
-                               V8ExtrasMode v8_extras_mode,
                                v8::ArrayBuffer::Allocator* allocator,
                                const intptr_t* reference_table) {
   CHECK(allocator);
-  V8Initializer::Initialize(mode, v8_extras_mode);
+  V8Initializer::Initialize(mode);
   g_array_buffer_allocator = allocator;
   g_reference_table = reference_table;
 }

gin/public/isolate_holder.h

@@ -46,12 +46,6 @@ class GIN_EXPORT IsolateHolder {
     kAllowAtomicsWait
   };
 
-  // Indicates whether V8 works with stable or experimental v8 extras.
-  enum V8ExtrasMode {
-    kStableV8Extras,
-    kStableAndExperimentalV8Extras,
-  };
-
   // Indicates how the Isolate instance will be created.
   enum class IsolateCreationMode {
     kNormal,
@@ -96,7 +90,6 @@ class GIN_EXPORT IsolateHolder {
   // external references, |reference_table| needs to point an array of those
   // reference pointers. Otherwise, it can be nullptr.
   static void Initialize(ScriptMode mode,
-                         V8ExtrasMode v8_extras_mode,
                          v8::ArrayBuffer::Allocator* allocator,
                          const intptr_t* reference_table = nullptr);
 

gin/shell/gin_main.cc

@@ -82,7 +82,6 @@ int main(int argc, char** argv) {
 
   {
     gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                   gin::IsolateHolder::kStableV8Extras,
                                    gin::ArrayBufferAllocator::SharedInstance());
     gin::IsolateHolder instance(
         base::ThreadTaskRunnerHandle::Get(),

gin/shell_runner_unittest.cc

@@ -34,7 +34,6 @@ TEST(RunnerTest, Run) {
 #endif
 
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                 gin::IsolateHolder::kStableV8Extras,
                                  gin::ArrayBufferAllocator::SharedInstance());
   gin::IsolateHolder instance(base::ThreadTaskRunnerHandle::Get(),
                               gin::IsolateHolder::IsolateType::kTest);

gin/test/v8_test.cc

@@ -27,7 +27,6 @@ void V8Test::SetUp() {
   gin::V8Initializer::LoadV8Natives();
 #endif
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                 gin::IsolateHolder::kStableV8Extras,
                                  gin::ArrayBufferAllocator::SharedInstance());
 
   instance_ = CreateIsolateHolder();

gin/v8_initializer.cc

@@ -204,8 +204,7 @@ enum LoadV8FileResult {
 }  // namespace
 
 // static
-void V8Initializer::Initialize(IsolateHolder::ScriptMode mode,
-                               IsolateHolder::V8ExtrasMode v8_extras_mode) {
+void V8Initializer::Initialize(IsolateHolder::ScriptMode mode) {
   static bool v8_is_initialized = false;
   if (v8_is_initialized)
     return;
@@ -224,10 +223,6 @@ void V8Initializer::Initialize(IsolateHolder::ScriptMode mode,
     static const char use_strict[] = "--use_strict";
     v8::V8::SetFlagsFromString(use_strict, sizeof(use_strict) - 1);
   }
-  if (IsolateHolder::kStableAndExperimentalV8Extras == v8_extras_mode) {
-    static const char flag[] = "--experimental_extras";
-    v8::V8::SetFlagsFromString(flag, sizeof(flag) - 1);
-  }
 
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
   v8::StartupData natives;

gin/v8_initializer.h

@@ -20,8 +20,7 @@ namespace gin {
 class GIN_EXPORT V8Initializer {
  public:
   // This should be called by IsolateHolder::Initialize().
-  static void Initialize(IsolateHolder::ScriptMode mode,
-                         IsolateHolder::V8ExtrasMode v8_extras_mode);
+  static void Initialize(IsolateHolder::ScriptMode mode);
 
   // Get address and size information for currently loaded snapshot.
   // If no snapshot is loaded, the return values are null for addresses

net/proxy_resolution/proxy_resolver_v8.cc

@@ -392,7 +392,6 @@ class SharedIsolateFactory {
 
         gin::IsolateHolder::Initialize(
             gin::IsolateHolder::kNonStrictMode,
-            gin::IsolateHolder::kStableV8Extras,
             gin::ArrayBufferAllocator::SharedInstance());
 
         has_initialized_v8_ = true;

pdf/pdfium/pdfium_engine.cc

@@ -536,7 +536,6 @@ void SetUpV8() {
   const char* recommended = FPDF_GetRecommendedV8Flags();
   v8::V8::SetFlagsFromString(recommended, strlen(recommended));
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
-                                 gin::IsolateHolder::kStableV8Extras,
                                  gin::ArrayBufferAllocator::SharedInstance());
   DCHECK(!g_isolate_holder);
   g_isolate_holder = new gin::IsolateHolder(

third_party/blink/renderer/bindings/core/v8/v8_initializer.cc

@@ -691,12 +691,8 @@ void V8Initializer::InitializeMainThread(const intptr_t* reference_table) {
   WTF::ArrayBufferContents::Initialize(AdjustAmountOfExternalAllocatedMemory);
 
   DEFINE_STATIC_LOCAL(ArrayBufferAllocator, array_buffer_allocator, ());
-  auto v8_extras_mode = RuntimeEnabledFeatures::ExperimentalV8ExtrasEnabled()
-                            ? gin::IsolateHolder::kStableAndExperimentalV8Extras
-                            : gin::IsolateHolder::kStableV8Extras;
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
-                                 v8_extras_mode, &array_buffer_allocator,
-                                 reference_table);
+                                 &array_buffer_allocator, reference_table);
 
   ThreadScheduler* scheduler = ThreadScheduler::Current();
 

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -460,10 +460,6 @@
       name: "ExperimentalShouldYield",
       status: "experimental"
     },
-    {
-      name: "ExperimentalV8Extras",
-      status: "experimental",
-    },
     {
       name: "ExtendedTextMetrics",
       status: "experimental",