Replaced PassRefPtr copies with moves in Source/core.

third_party/WebKit/Source/core/events/PopStateEvent.cpp

 /*
  * Copyright (C) 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 46 matching lines @@
 {
 }
 
 PopStateEvent* PopStateEvent::create()
 {
     return new PopStateEvent;
 }
 
 PopStateEvent* PopStateEvent::create(PassRefPtr<SerializedScriptValue> serializedState, History* history)
 {
-    return new PopStateEvent(serializedState, history);
+    return new PopStateEvent(std::move(serializedState), history);
 }
 
 PopStateEvent* PopStateEvent::create(const AtomicString& type, const PopStateEventInit& initializer)
 {
     return new PopStateEvent(type, initializer);
 }
 
 const AtomicString& PopStateEvent::interfaceName() const
 {
     return EventNames::PopStateEvent;
 }
 
 DEFINE_TRACE(PopStateEvent)
 {
     visitor->trace(m_history);
     Event::trace(visitor);
 }
 
 } // namespace blink