Articulate the cancel behavior in the WebTouchEvent.

content/common/input/web_touch_event_traits.cc

 // Copyright 2014 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_touch_event_traits.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 
@@ skipping 37 matching lines @@
   return true;
 }
 
 void WebTouchEventTraits::ResetType(WebInputEvent::Type type,
                                     double timestamp_sec,
                                     WebTouchEvent* event) {
   DCHECK(WebInputEvent::isTouchEventType(type));
   DCHECK(type != WebInputEvent::TouchScrollStarted);
 
   event->type = type;
-  event->cancelable = (type != WebInputEvent::TouchCancel);
+  event->dispatchType = type == WebInputEvent::TouchCancel
+                            ? WebInputEvent::EventNonBlocking
+                            : WebInputEvent::Blocking;
   event->timeStampSeconds = timestamp_sec;
 }
 
 void WebTouchEventTraits::ResetTypeAndTouchStates(WebInputEvent::Type type,
                                                   double timestamp_sec,
                                                   WebTouchEvent* event) {
   ResetType(type, timestamp_sec, event);
 
   WebTouchPoint::State newState = WebTouchPoint::StateUndefined;
   switch (event->type) {
@@ skipping 11 matching lines @@
       break;
     default:
       NOTREACHED();
       break;
   }
   for (size_t i = 0; i < event->touchesLength; ++i)
     event->touches[i].state = newState;
 }
 
 }  // namespace content