Rename ContextDestructionObserver to ContextLifecycleObserver

Source/core/dom/ActiveDOMObject.h

 /*
  * Copyright (C) 2008 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, 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 COMPUTER, 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 ActiveDOMObject_h
 #define ActiveDOMObject_h
 
-#include "core/dom/ContextDestructionObserver.h"
+#include "core/dom/ContextLifecycleObserver.h"
 #include <wtf/Assertions.h>
 #include <wtf/Forward.h>
 
 namespace WebCore {
 
-class ActiveDOMObject : public ContextDestructionObserver {
+class ActiveDOMObject : public ContextLifecycleObserver {
 public:
     ActiveDOMObject(ScriptExecutionContext*);
 
     // suspendIfNeeded() should be called exactly once after object construction to synchronize
     // the suspend state with that in ScriptExecutionContext.
     void suspendIfNeeded();
 #if !ASSERT_DISABLED
     bool suspendIfNeededCalled() const { return m_suspendIfNeededCalled; }
 #endif
 
@@ skipping 37 matching lines @@
 private:
     unsigned m_pendingActivityCount;
 #if !ASSERT_DISABLED
     bool m_suspendIfNeededCalled;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // ActiveDOMObject_h