Drop V8RecursionScope dependency on ExecutionContext

Source/bindings/core/v8/WorkerScriptController.h

 /*
  * 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 64 matching lines @@
     // Returns true if the embedder should stop calling idleNotification
     // until real work has been done.
     bool idleNotification() { return m_isolate->IdleNotification(1000); }
 
     // Used by Inspector agents:
     ScriptState* scriptState() { return m_scriptState.get(); }
 
     // Used by V8 bindings:
     v8::Local<v8::Context> context() { return m_scriptState ? m_scriptState->context() : v8::Local<v8::Context>(); }
 
+    v8::Isolate* isolate() { return m_isolate; }
+
 private:
     class WorkerGlobalScopeExecutionState;
 
     bool isContextInitialized() { return m_scriptState && !!m_scriptState->perContextData(); }
 
     // Evaluate a script file in the current execution environment.
     ScriptValue evaluate(const String& script, const String& fileName, const TextPosition& scriptStartPosition);
 
     v8::Isolate* m_isolate;
     WorkerGlobalScope& m_workerGlobalScope;
@@ skipping 11 matching lines @@
     // Oilpan enabled; stack scanning will visit the object and
     // trace its on-heap fields.
     GC_PLUGIN_IGNORE("394615")
     WorkerGlobalScopeExecutionState* m_globalScopeExecutionState;
     OwnPtr<V8IsolateInterruptor> m_interruptor;
 };
 
 } // namespace blink
 
 #endif // WorkerScriptController_h