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

Source/bindings/core/v8/WorkerScriptController.cpp

Index: Source/bindings/core/v8/WorkerScriptController.cpp
diff --git a/Source/bindings/core/v8/WorkerScriptController.cpp b/Source/bindings/core/v8/WorkerScriptController.cpp
index f8ea19af629e8ecd45612a6df87feb172d42d73b..056cf29af8441c25894417fba0ea26d592e42901 100644
--- a/Source/bindings/core/v8/WorkerScriptController.cpp
+++ b/Source/bindings/core/v8/WorkerScriptController.cpp
@@ -103,15 +103,13 @@ public:
     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());