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

Source/core/page/PageLifecycleObserver.h

+
 /*
- * Copyright (C) 2009 Apple Inc. All Rights Reserved.
+ * Copyright (C) 2013 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 APPLE 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. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef RenderMediaControls_h
-#define RenderMediaControls_h
+#ifndef PageLifecycleObserver_h
+#define PageLifecycleObserver_h
 
-#include "core/html/shadow/MediaControlElements.h"
+#include "core/dom/LifecycleObserver.h"
 
 namespace WebCore {
 
-struct PaintInfo;
+class Page;
 
-class HTMLMediaElement;
-class IntRect;
-class IntSize;
-class RenderBox;
-class RenderObject;
-class RenderStyle;
+class PageLifecycleObserver : public LifecycleObserver {

[abarth-chromium, 2013/07/09 18:27:52]

Can this class provide a page() function that returns
static_cast<Page*>(context()) ?

[Michael van Ouwerkerk, 2013/07/10 13:25:09]

Done.

+public:
+    explicit PageLifecycleObserver(Page*);
+    virtual ~PageLifecycleObserver();
 
-class RenderMediaControls {
-public:
+    virtual void pageVisibilityChanged() { }
 };
 
 } // namespace WebCore
 
-#endif // RenderMediaControls_h
+#endif // PageLifecycleObserver_h