Implement async touchmove dispatch during scroll

content/common/input/web_input_event_traits.h

Index: content/common/input/web_input_event_traits.h
diff --git a/content/common/input/web_input_event_traits.h b/content/common/input/web_input_event_traits.h
index 9751fc088cbfe34fcb0d9b0e4a663542fdd20980..7aad3b2ac3d845a616b090a5dd71d28d04ce4c8e 100644
--- a/content/common/input/web_input_event_traits.h
+++ b/content/common/input/web_input_event_traits.h
@@ -23,6 +23,7 @@ class CONTENT_EXPORT WebInputEventTraits {
   static void Coalesce(const blink::WebInputEvent& event_to_coalesce,
                        blink::WebInputEvent* event);
   static bool IgnoresAckDisposition(blink::WebInputEvent::Type type);

[Rick Byers, 2014/04/22 14:52:59]

Can we get rid of this type-only version (to avoid mistakes)?  If that's too
painful, let's have it CHECK that the provided event isn't one of the event
types that may or may not ignore ACK.

[jdduke (slow), 2014/04/23 19:57:41]

I think we can. There's one place that still uses it, but it's only as a sanity
check.

+  static bool IgnoresAckDisposition(const blink::WebInputEvent& event);
 };
 
 }  // namespace content