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

ui/chromeos/touch_exploration_controller.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/chromeos/touch_exploration_controller.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 175 matching lines @@
 
   // If the user is in a gesture state, or if there is a possiblity that the
   // user will enter it in the future, we send the event to the gesture
   // provider so it can keep track of the state of the fingers. When the user
   // leaves one of these states, SET_STATE will set the gesture provider to
   // NULL.
   if (gesture_provider_.get()) {
     ui::TouchEvent mutable_touch_event = touch_event;
     if (gesture_provider_->OnTouchEvent(&mutable_touch_event)) {
       gesture_provider_->OnTouchEventAck(mutable_touch_event.unique_event_id(),
-                                         false);
+                                         ER_UNHANDLED);
     }
     ProcessGestureEvents();
   }
 
   ui::EventRewriteStatus status = ui::EVENT_REWRITE_CONTINUE;
   // The rest of the processing depends on what state we're in.
   switch (state_) {
     case NO_FINGERS_DOWN:
       status = InNoFingersDown(touch_event, rewritten_event);
       break;
@@ skipping 985 matching lines @@
       return "TWO_FINGER_TAP";
   }
   return "Not a state";
 }
 
 float TouchExplorationController::GetSplitTapTouchSlop() {
   return gesture_detector_config_.touch_slop * 3;
 }
 
 }  // namespace ui