[NOT READY FOR REVIEW YET]workers: Some refactoring to allow creating new kind of worker threads

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 85 matching lines @@
     // (or 0, if outermost.) Upon return from evaluate(), the
     // 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(0)
+WorkerScriptController::WorkerScriptController(WorkerGlobalScope& workerGlobalScope, v8::Isolate* isolate)
+    : m_isolate(isolate)
     , m_workerGlobalScope(workerGlobalScope)
     , m_executionForbidden(false)
     , m_executionScheduledToTerminate(false)
     , m_globalScopeExecutionState(0)
 {
-    m_isolate = V8PerIsolateData::initialize();
-    V8Initializer::initializeWorker(m_isolate);
     m_world = DOMWrapperWorld::create(m_isolate, WorkerWorldId);
     m_interruptor = adoptPtr(new V8IsolateInterruptor(m_isolate));
     ThreadState::current()->addInterruptor(m_interruptor.get());
     ThreadState::current()->registerTraceDOMWrappers(m_isolate, V8GCController::traceDOMWrappers);
 }
 
 // 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 {
@@ skipping 184 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(m_isolate, errorMessage));
 }
 
 } // namespace blink