[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/controller/BlinkInitializer.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "controller/BlinkInitializer.h"
 
 #include "bindings/core/v8/V8Initializer.h"
+#include "bindings/modules/v8/V8ContextSnapshotExternalReferences.h"
 #include "core/animation/AnimationClock.h"
 #include "modules/ModulesInitializer.h"
 #include "platform/bindings/Microtask.h"
 #include "platform/bindings/V8PerIsolateData.h"
 #include "platform/heap/Heap.h"
 #include "platform/wtf/Assertions.h"
 #include "platform/wtf/PtrUtil.h"
 #include "platform/wtf/WTF.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebThread.h"
@@ skipping 18 matching lines @@
 
 static ModulesInitializer& GetModulesInitializer() {
   DEFINE_STATIC_LOCAL(std::unique_ptr<ModulesInitializer>, initializer,
                       (WTF::WrapUnique(new ModulesInitializer)));
   return *initializer;
 }
 
 void InitializeBlink(Platform* platform) {
   Platform::Initialize(platform);
 
-  V8Initializer::InitializeMainThread();
-
+  // Refernce table must be updated before creating an isolate.

[haraken, 2017/07/10 06:52:09]

reference

We could drop this comment because now the initialization logic is encapsulated
in V8Initializer::InitializeMainThread.

[peria, 2017/07/10 10:18:43]

Done.

+  V8Initializer::InitializeMainThread(
+      V8ContextSnapshotExternalReferences::GetTable());
   GetModulesInitializer().Initialize();
 
   // currentThread is null if we are running on a thread without a message loop.
   if (WebThread* current_thread = platform->CurrentThread()) {
     DCHECK(!g_end_of_task_runner);
     g_end_of_task_runner = new EndOfTaskRunner;
     current_thread->AddTaskObserver(g_end_of_task_runner);
   }
 }
 
 }  // namespace blink