[bindings] Refactor ScriptStateForTesting, V8TestingScope into V8BindingForTesting.h/cpp

Source/bindings/core/v8/ScriptState.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ScriptState_h
 #define ScriptState_h
 
 #include "bindings/core/v8/ScopedPersistent.h"
 #include "bindings/core/v8/V8PerContextData.h"
 #include "core/CoreExport.h"
@@ skipping 99 matching lines @@
     // This OwnPtr causes a cycle:
     // V8PerContextData --(Persistent)--> v8::Context --(RefPtr)--> ScriptState --(OwnPtr)--> V8PerContextData
     // So you must explicitly clear the OwnPtr by calling disposePerContextData()
     // once you no longer need V8PerContextData. Otherwise, the v8::Context will leak.
     OwnPtr<V8PerContextData> m_perContextData;
 
     bool m_globalObjectDetached;
     Vector<Observer*> m_observers;
 };
 
-class ScriptStateForTesting : public ScriptState {
-public:
-    static PassRefPtr<ScriptStateForTesting> create(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
-
-    virtual ExecutionContext* executionContext() const override;
-    virtual void setExecutionContext(ExecutionContext*) override;
-
-private:
-    ScriptStateForTesting(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
-
-    ExecutionContext* m_executionContext;
-};
-
 // ScriptStateProtectingContext keeps the context associated with the ScriptState alive.
 // You need to call clear() once you no longer need the context. Otherwise, the context will leak.
 class ScriptStateProtectingContext {
     WTF_MAKE_NONCOPYABLE(ScriptStateProtectingContext);
 public:
     ScriptStateProtectingContext(ScriptState* scriptState)
         : m_scriptState(scriptState)
     {
         if (m_scriptState)
             m_context.set(m_scriptState->isolate(), m_scriptState->context());
     }
 
     ScriptState* operator->() const { return m_scriptState.get(); }
     ScriptState* get() const { return m_scriptState.get(); }
     void clear()
     {
         m_scriptState = nullptr;
         m_context.clear();
     }
 
 private:
     RefPtr<ScriptState> m_scriptState;
     ScopedPersistent<v8::Context> m_context;
 };
 
 }
 
 #endif // ScriptState_h