Mark touchcancel events as uncancelable

content/browser/renderer_host/ui_events_helper.cc

 // Copyright (c) 2012 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/browser/renderer_host/ui_events_helper.h"
 
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 
@@ skipping 308 matching lines @@
 
   // Mark the rest of the points as stationary.
   for (unsigned i = 0; i < web_event->touchesLength; ++i) {
     blink::WebTouchPoint* iter = web_event->touches + i;
     if (iter != point)
       iter->state = blink::WebTouchPoint::StateStationary;
   }
 
   // Update the type of the touch event.
   web_event->type = TouchEventTypeFromEvent(event);
+  if (web_event->type == blink::WebInputEvent::TouchCancel)
+    web_event->cancelable = false;
   web_event->timeStampSeconds = event.time_stamp().InSecondsF();
   web_event->modifiers = EventFlagsToWebEventModifiers(event.flags());
 
   return point;
 }
 
 }  // namespace content