Don't use webmediaplayer to FullscreenController about fullscreen change

content/renderer/render_widget.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 367 matching lines @@
   void OnShowImeIfNeeded();
 
   // Whenever an IME event that needs an acknowledgement is sent to the browser,
   // the number of outstanding IME events that needs acknowledgement should be
   // incremented. All IME events will be dropped until we receive an ack from
   // the browser.
   void IncrementOutstandingImeEventAcks();
 
   // Called by the browser process for every required IME acknowledgement.
   void OnImeEventAck();
+
+  // Called when page enters or exits fullscreen state.
+  void OnFullscreenChanged(bool is_fullscreen);
 #endif
 
   // Notify the compositor about a change in viewport size. This should be
   // used only with auto resize mode WebWidgets, as normal WebWidgets should
   // go through OnResize.
   void AutoResizeCompositor();
 
   virtual void SetDeviceScaleFactor(float device_scale_factor);
   virtual bool SetDeviceColorProfile(const std::vector<char>& color_profile);
 
@@ skipping 314 matching lines @@
 
   ui::MenuSourceType context_menu_source_type_;
   gfx::Point touch_editing_context_menu_location_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_