Rename FrameDestructionObserver to LocalFrameLifecycleObserver.

Source/core/frame/LocalFrameLifecycleObserver.h

 /*
  * Copyright (C) 2011 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:
  * 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef FrameDestructionObserver_h
-#define FrameDestructionObserver_h
+#ifndef LocalFrameLifecycleObserver_h
+#define LocalFrameLifecycleObserver_h
 
 #include "core/CoreExport.h"
 #include "core/frame/LocalFrame.h"
 #include "platform/LifecycleObserver.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class LocalFrame;
 class LocalFrameLifecycleNotifier;
 
-class CORE_EXPORT FrameDestructionObserver : public LifecycleObserver<LocalFrame, FrameDestructionObserver, LocalFrameLifecycleNotifier> {
+class CORE_EXPORT LocalFrameLifecycleObserver : public LifecycleObserver<LocalFrame, LocalFrameLifecycleObserver, LocalFrameLifecycleNotifier> {
 public:
     virtual void willDetachFrameHost() { }
     virtual void contextDestroyed()
     {
         setContext(nullptr);
     }
 
     LocalFrame* frame() const { return lifecycleContext(); }
 
 protected:
-    explicit FrameDestructionObserver(LocalFrame* frame)
+    explicit LocalFrameLifecycleObserver(LocalFrame* frame)
         : LifecycleObserver(frame)
     {
     }
 };
 
 } // namespace blink
 
-#endif // FrameDestructionObserver_h
+#endif // LocalFrameLifecycleObserver_h