WebKit & WebCore part of the device motion implementation using the platform layer.

Source/WebCore/page/DOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
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         // FIXME: When this DOMWindow is no longer the active DOMWindow (i.e.,
         // when its document is no longer the document that is displayed in its
         // frame), we would like to zero out m_frame to avoid being confused
         // by the document that is currently active in m_frame.
         bool isCurrentlyDisplayedInFrame() const;
 
         void willDetachDocumentFromFrame();
         void willDestroyCachedFrame();
 
-        Page* page();
-
     private:
         explicit DOMWindow(Document*);
 
+        Page* page();
+
         virtual void frameDestroyed() OVERRIDE;
         virtual void willDetachPage() OVERRIDE;
 
         virtual void refEventTarget() { ref(); }
         virtual void derefEventTarget() { deref(); }
         virtual EventTargetData* eventTargetData();
         virtual EventTargetData* ensureEventTargetData();
 
         static Frame* createWindow(const String& urlString, const AtomicString& frameName, const WindowFeatures&,
             DOMWindow* activeWindow, Frame* firstFrame, Frame* openerFrame,
@@ skipping 48 matching lines @@
     }
 
     inline String DOMWindow::defaultStatus() const
     {
         return m_defaultStatus;
     } 
 
 } // namespace WebCore
 
 #endif // DOMWindow_h