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

ui/events/blink/blink_event_util.cc

 // Copyright 2015 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.
 
 // MSVC++ requires this to be set before any other includes to get M_PI.
 #define _USE_MATH_DEFINES
 
 #include "ui/events/blink/blink_event_util.h"
 
 #include <stddef.h>
@@ skipping 609 matching lines @@
       break;
     case GestureDeviceType::DEVICE_TOUCHPAD:
       gesture.source_device = blink::kWebGestureDeviceTouchpad;
       break;
     case GestureDeviceType::DEVICE_UNKNOWN:
       NOTREACHED() << "Unknown device type is not allowed";
       gesture.source_device = blink::kWebGestureDeviceUninitialized;
       break;
   }
 
+  gesture.is_source_touch_event_set_non_blocking =
+      details.is_source_touch_event_set_non_blocking();
+
   gesture.unique_touch_event_id = unique_touch_event_id;
 
   switch (details.type()) {
     case ET_GESTURE_SHOW_PRESS:
       gesture.SetType(WebInputEvent::kGestureShowPress);
       gesture.data.show_press.width = details.bounding_box_f().width();
       gesture.data.show_press.height = details.bounding_box_f().height();
       break;
     case ET_GESTURE_DOUBLE_TAP:
       gesture.SetType(WebInputEvent::kGestureDoubleTap);
@@ skipping 343 matching lines @@
   switch (type) {
     case blink::WebGestureEvent::kGestureScrollUpdate:
     case blink::WebGestureEvent::kGesturePinchUpdate:
       return true;
     default:
       return false;
   }
 }
 
 }  // namespace ui