[Android] Short-circuit touch forwarding when no touch handlers exist

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index 81c78db351697ebe096ad7f1198f51445ea070be..0dbceef78d3e9a8a6380597fdbd4b9e8a6892e3a 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -352,6 +352,7 @@ class ContentViewCoreImpl : public ContentViewCore,
 
   void DeleteScaledSnapshotTexture();
 
+  bool OnMotionEvent(const ui::MotionEvent& event);

[tdresser, 2014/03/28 17:55:27]

Would DispatchMotionEvent be a better name?

[jdduke (slow), 2014/03/28 18:33:55]

Probably, but in the Java boundary land |OnFoo| is essentially equivalent to
|DispatchFoo| and I'm not sure there's a need to clarify.

[tdresser, 2014/03/28 18:40:05]

Fine with me.

   void SendGestureEvent(const blink::WebGestureEvent& event);
 
   // Update focus state of the RenderWidgetHostView.