Mark touchcancel events as uncancelable

content/browser/renderer_host/input/touch_event_queue.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/browser/renderer_host/input/touch_event_queue.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/stl_util.h"
@@ skipping 14 matching lines @@
 // slop determination when using fractional DIP coordinates (assuming the slop
 // region and DPI scale are reasonably proportioned).
 const float kSlopEpsilon = .05f;
 
 typedef std::vector<TouchEventWithLatencyInfo> WebTouchEventWithLatencyList;
 
 TouchEventWithLatencyInfo ObtainCancelEventForTouchEvent(
     const TouchEventWithLatencyInfo& event_to_cancel) {
   TouchEventWithLatencyInfo event = event_to_cancel;
   event.event.type = WebInputEvent::TouchCancel;
+  event.event.cancelable = false;
   for (size_t i = 0; i < event.event.touchesLength; i++)
     event.event.touches[i].state = WebTouchPoint::StateCancelled;
   return event;
 }
 
 bool ShouldTouchTypeTriggerTimeout(WebInputEvent::Type type) {
   return type == WebInputEvent::TouchStart ||
          type == WebInputEvent::TouchMove;
 }
 
@@ skipping 590 matching lines @@
   } else if (event.type == WebInputEvent::TouchStart) {
     for (unsigned i = 0; i < event.touchesLength; ++i) {
       const WebTouchPoint& point = event.touches[i];
       if (point.state == WebTouchPoint::StatePressed)
         touch_ack_states_[point.id] = ack_result;
     }
   }
 }
 
 }  // namespace content