Switch blink to use a gin-managed isolate.

Source/bindings/core/v8/WorkerScriptController.cpp

 /*
  * Copyright (C) 2009, 2012 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 87 matching lines @@
     // WorkerScriptController's WorkerGlobalScopeExecutionState is popped
     // and the previous one restored (see above dtor.)
     //
     // With Oilpan, |m_outerState| isn't traced. It'll be "up the stack"
     // and its fields will be traced when scanning the stack.
     WorkerScriptController* m_controller;
     WorkerGlobalScopeExecutionState* m_outerState;
 };
 
 WorkerScriptController::WorkerScriptController(WorkerGlobalScope& workerGlobalScope)
-    : m_isolate(v8::Isolate::New())
+    : m_isolate(0)
     , m_workerGlobalScope(workerGlobalScope)
     , m_executionForbidden(false)
     , m_executionScheduledToTerminate(false)
     , m_globalScopeExecutionState(0)
 {
-    m_isolate->Enter();
+    m_isolate = V8PerIsolateData::initialize();
     V8Initializer::initializeWorker(m_isolate);
-    v8::V8::Initialize();
-    V8PerIsolateData::ensureInitialized(m_isolate);
     m_world = DOMWrapperWorld::create(WorkerWorldId);
     m_interruptor = adoptPtr(new V8IsolateInterruptor(m_isolate));
     ThreadState::current()->addInterruptor(m_interruptor.get());
 }
 
 // We need to postpone V8 Isolate destruction until the very end of
 // worker thread finalization when all objects on the worker heap
 // are destroyed.
 class IsolateCleanupTask : public ThreadState::CleanupTask {
 public:
     static PassOwnPtr<IsolateCleanupTask> create(v8::Isolate* isolate)
     {
         return adoptPtr(new IsolateCleanupTask(isolate));
     }
 
     virtual void postCleanup()
     {
         V8PerIsolateData::dispose(m_isolate);
-        m_isolate->Exit();
-        m_isolate->Dispose();
     }
 
 private:
     explicit IsolateCleanupTask(v8::Isolate* isolate) : m_isolate(isolate)  { }
 
     v8::Isolate* m_isolate;
 };
 
 WorkerScriptController::~WorkerScriptController()
 {
@@ skipping 165 matching lines @@
 
 void WorkerScriptController::rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent> errorEvent, ExceptionState& exceptionState)
 {
     const String& errorMessage = errorEvent->message();
     if (m_globalScopeExecutionState)
         m_globalScopeExecutionState->m_errorEventFromImportedScript = errorEvent;
     exceptionState.rethrowV8Exception(V8ThrowException::createGeneralError(errorMessage, m_isolate));
 }
 
 } // namespace blink