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 e492d86166b9a5d86e62c5d16371f550004ca9f8..ab60709aca29896588dfc92dfa83b3cc8f40ae49 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -485,6 +485,8 @@ 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;