Extract simpler classes for observing context lifecycle and observe Page lifecycle inNavigatorVibra…

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.
  *
  */
 
 #ifndef ContextLifecycleObserver_h
 #define ContextLifecycleObserver_h
 
+#include "core/platform/LifecycleObserver.h"
+
 namespace WebCore {
 
 class ScriptExecutionContext;
 
-class ContextLifecycleObserver {
+class ContextLifecycleObserver : public LifecycleObserver {
 public:
-    enum Type {
-        ActiveDOMObjectType,
-        DocumentLifecycleObserverType,
-        GenericType
-    };
+    explicit ContextLifecycleObserver(ScriptExecutionContext*, Type = GenericType);
 
-    explicit ContextLifecycleObserver(ScriptExecutionContext*, Type = GenericType);
-    virtual void contextDestroyed();
+    virtual void contextDestroyed() OVERRIDE;
 
     ScriptExecutionContext* scriptExecutionContext() const { return m_scriptExecutionContext; }
 
 protected:
     virtual ~ContextLifecycleObserver();
+
     void observeContext(ScriptExecutionContext*, Type);
 
     ScriptExecutionContext* m_scriptExecutionContext;
 };
 
 } // namespace WebCore
 
 #endif // ContextLifecycleObserver_h