Implement async touchmove dispatch during scroll

content/common/input/web_input_event_traits.cc

Index: content/common/input/web_input_event_traits.cc
diff --git a/content/common/input/web_input_event_traits.cc b/content/common/input/web_input_event_traits.cc
index 7de816a1a6bc9645e7232f8fdbd8cc6a7d709019..90d80696da1ac51a7c74c5c3ebfa36156ac94f79 100644
--- a/content/common/input/web_input_event_traits.cc
+++ b/content/common/input/web_input_event_traits.cc
@@ -358,4 +358,14 @@ bool WebInputEventTraits::IgnoresAckDisposition(
   return false;
 }
 
+bool WebInputEventTraits::IgnoresAckDisposition(const WebInputEvent& event) {
+  if (IgnoresAckDisposition(event.type))
+    return true;
+
+  if (WebInputEvent::isTouchEventType(event.type))
+    return static_cast<const WebTouchEvent&>(event).cancelable;

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

You're missing a !.  Cancelable events must wait for their disposition.

I've got an initial (as-yet untested) version of the blink-side patch that adds
this field here: https://codereview.chromium.org/247483002/

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

Of course, yes!

+
+  return false;
+}
+
 }  // namespace content