Revert "Remove OwnPtr from Blink."

third_party/WebKit/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"
 #include "wtf/RefCounted.h"
-#include <memory>
 #include <v8-debug.h>
 #include <v8.h>
 
 namespace blink {
 
 class LocalDOMWindow;
 class DOMWrapperWorld;
 class ExecutionContext;
 class LocalFrame;
 class ScriptValue;
@@ skipping 86 matching lines @@
     ScriptState(v8::Local<v8::Context>, PassRefPtr<DOMWrapperWorld>);
 
 private:
     v8::Isolate* m_isolate;
     // This persistent handle is weak.
     ScopedPersistent<v8::Context> m_context;
 
     // This RefPtr doesn't cause a cycle because all persistent handles that DOMWrapperWorld holds are weak.
     RefPtr<DOMWrapperWorld> m_world;
 
-    // This std::unique_ptr causes a cycle:
-    // V8PerContextData --(Persistent)--> v8::Context --(RefPtr)--> ScriptState --(std::unique_ptr)--> V8PerContextData
-    // So you must explicitly clear the std::unique_ptr by calling disposePerContextData()
+    // 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.
-    std::unique_ptr<V8PerContextData> m_perContextData;
+    OwnPtr<V8PerContextData> m_perContextData;
 
 #if ENABLE(ASSERT)
     bool m_globalObjectDetached;
 #endif
 };
 
 // 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);
@@ skipping 15 matching lines @@
     }
 
 private:
     RefPtr<ScriptState> m_scriptState;
     ScopedPersistent<v8::Context> m_context;
 };
 
 } // namespace blink
 
 #endif // ScriptState_h