Implement async touchmove dispatch during scroll

content/common/input/web_input_event_traits.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/input/web_input_event_traits.h"
 
 #include <bitset>
 
 #include "base/logging.h"
 
@@ skipping 340 matching lines @@
     case WebInputEvent::MouseEnter:
     case WebInputEvent::MouseLeave:
     case WebInputEvent::ContextMenu:
       return true;
     default:
       break;
   }
   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