Add the actual location coordinates to the touch cancel event

ui/aura/window_event_dispatcher.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 "ui/aura/window_event_dispatcher.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/event_client.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_targeter.h"
 #include "ui/aura/window_tracker.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/hit_test.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/events/event.h"
+#include "ui/events/event_constants.h"

[tdresser, 2014/08/13 19:57:58]

Is this necessary?

[lanwei, 2014/08/14 00:38:46]

No, forgot to delete it.
Done.

 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/events/gestures/gesture_types.h"
 
 typedef ui::EventDispatchDetails DispatchDetails;
 
 namespace aura {
 
 namespace {
 
 // Returns true if |target| has a non-client (frame) component at |location|,
@@ skipping 98 matching lines @@
   DispatchDetails details =
       DispatchEvent(focused_window ? focused_window : window(), &event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 void WindowEventDispatcher::DispatchGestureEvent(ui::GestureEvent* event) {
   DispatchDetails details = DispatchHeldEvents();
   if (details.dispatcher_destroyed)
     return;
-
   Window* target = GetGestureTarget(event);
   if (target) {
     event->ConvertLocationToTarget(window(), target);
     DispatchDetails details = DispatchEvent(target, event);
     if (details.dispatcher_destroyed)
       return;
   }
 }
 
 DispatchDetails WindowEventDispatcher::DispatchMouseExitAtPoint(
@@ skipping 369 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // WindowEventDispatcher, ui::GestureEventHelper implementation:
 
 bool WindowEventDispatcher::CanDispatchToConsumer(
     ui::GestureConsumer* consumer) {
   Window* consumer_window = ConsumerToWindow(consumer);
   return (consumer_window && consumer_window->GetRootWindow() == window());
 }
 
 void WindowEventDispatcher::DispatchCancelTouchEvent(ui::TouchEvent* event) {
+  event->UpdateForRootTransform(host_->GetRootTransform());

[tdresser, 2014/08/13 19:57:58]

Add a comment indicating why this is here.

[lanwei, 2014/08/14 00:38:46]

Done.

   DispatchDetails details = OnEventFromSource(event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WindowEventDispatcher, WindowObserver implementation:
 
 void WindowEventDispatcher::OnWindowDestroying(Window* window) {
   if (!host_->window()->Contains(window))
@@ skipping 355 matching lines @@
     if (!ui::GestureRecognizer::Get()->ProcessTouchEventPreDispatch(orig_event,
                                                                     target)) {
       event->SetHandled();
     }
   }
 
   PreDispatchLocatedEvent(target, event);
 }
 
 }  // namespace aura