[VSync Queue] Plug touch ack to gesture events and flush vsync queue if necessary

ui/events/gestures/gesture_recognizer_impl.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 "ui/events/gestures/gesture_recognizer_impl.h"
 
 #include <stddef.h>
 
 #include <limits>
 #include <memory>
@@ skipping 264 matching lines @@
     return false;
 
   GestureProviderAura* gesture_provider =
       GetGestureProviderForConsumer(consumer);
   return gesture_provider->OnTouchEvent(event);
 }
 
 GestureRecognizer::Gestures GestureRecognizerImpl::AckTouchEvent(
     uint32_t unique_event_id,
     ui::EventResult result,
+    bool is_source_touch_event_set_non_blocking,
     GestureConsumer* consumer) {
   GestureProviderAura* gesture_provider = nullptr;
 
   // Check if we have already processed this event before dispatch and have a
   // consumer associated with it.
   auto event_to_gesture_provider_iterator =
       event_to_gesture_provider_.find(unique_event_id);
   if (event_to_gesture_provider_iterator != event_to_gesture_provider_.end()) {
     gesture_provider = event_to_gesture_provider_iterator->second;
     event_to_gesture_provider_.erase(event_to_gesture_provider_iterator);
   } else {
     gesture_provider = GetGestureProviderForConsumer(consumer);
   }
-  gesture_provider->OnTouchEventAck(unique_event_id, result != ER_UNHANDLED);
+  gesture_provider->OnTouchEventAck(unique_event_id, result != ER_UNHANDLED,
+                                    is_source_touch_event_set_non_blocking);
   return gesture_provider->GetAndResetPendingGestures();
 }
 
 bool GestureRecognizerImpl::CleanupStateForConsumer(
     GestureConsumer* consumer) {
   bool state_cleaned_up = false;
 
   auto consumer_gesture_provider_it = consumer_gesture_provider_.find(consumer);
   if (consumer_gesture_provider_it != consumer_gesture_provider_.end()) {
     // Remove gesture provider associated with the consumer from
@@ skipping 62 matching lines @@
   std::vector<GestureEventHelper*>::iterator it;
   for (it = helpers.begin(); it != helpers.end(); ++it)
     gesture_recognizer->AddGestureEventHelper(*it);
 
   helpers.clear();
   g_gesture_recognizer_instance =
       static_cast<GestureRecognizerImpl*>(gesture_recognizer);
 }
 
 }  // namespace ui