Rename ContextDestructionObserver to ContextLifecycleObserver

Source/core/dom/ContextLifecycleObserver.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. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
-#ifndef ContextDestructionObserver_h
-#define ContextDestructionObserver_h
+#ifndef ContextLifecycleObserver_h
+#define ContextLifecycleObserver_h
 
 namespace WebCore {
 
 class ScriptExecutionContext;
 
-class ContextDestructionObserver {
+class ContextLifecycleObserver {
 public:
     enum Type {
         ActiveDOMObjectType,
         DocumentLifecycleObserverType,
         GenericType
     };
 
-    explicit ContextDestructionObserver(ScriptExecutionContext*, Type = GenericType);
+    explicit ContextLifecycleObserver(ScriptExecutionContext*, Type = GenericType);
     virtual void contextDestroyed();
 
     ScriptExecutionContext* scriptExecutionContext() const { return m_scriptExecutionContext; }
 
 protected:
-    virtual ~ContextDestructionObserver();
+    virtual ~ContextLifecycleObserver();
     void observeContext(ScriptExecutionContext*, Type);
 
     ScriptExecutionContext* m_scriptExecutionContext;
 };
 
 } // namespace WebCore
 
-#endif // ContextDestructionObserver_h
+#endif // ContextLifecycleObserver_h