Allows fullscreen to be triggered with the key events used for scrolling.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 72a5800f4f7ebaf10713cf390164da997aaee3c0..eb0692b650fe95e4a3e42ad25d8acba2a228d41f 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -478,6 +478,10 @@ class CONTENT_EXPORT RenderWidget
   // just handled.
   virtual void DidHandleTouchEvent(const WebKit::WebTouchEvent& event) {}
 
+  // Called by OnHandleInputEvent() to conditionally scroll up/down the top
+  // controls.
+  virtual bool MaybeScrollTopControls(const WebKit::WebInputEvent* event);
+
   // Check whether the WebWidget has any touch event handlers registered
   // at the given point.
   virtual bool HasTouchEventHandlersAt(const gfx::Point& point) const;