Fullscreen: make fullscreen requests come from RenderFrame

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 7be406d6a12a5ee369caef0f8b5a8cf2bbd12874..cf3bc3ca060d7af30a21758db0d0462014f8054d 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -477,6 +477,8 @@ class CONTENT_EXPORT RenderFrameImpl
         const blink::WebAXObject& end_object,
         int end_offset);
   virtual void didChangeManifest(blink::WebLocalFrame*);
+  virtual bool enterFullscreen();
+  virtual bool exitFullscreen();
 
   // WebMediaPlayerDelegate implementation:
   void DidPlay(blink::WebMediaPlayer* player) override;