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

third_party/WebKit/public/platform/WebGestureEvent.h

 // Copyright 2016 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.
 
 #ifndef WebGestureEvent_h
 #define WebGestureEvent_h
 
 #include "WebFloatSize.h"
 #include "WebGestureDevice.h"
 #include "WebInputEvent.h"
@@ skipping 35 matching lines @@
   // contains 0. See crbug.com/618738.
   uint32_t unique_touch_event_id;
 
   // This field exists to allow BrowserPlugin to mark GestureScroll events as
   // 'resent' to handle the case where an event is not consumed when first
   // encountered; it should be handled differently by the plugin when it is
   // sent for thesecond time. No code within Blink touches this, other than to
   // plumb it through event conversions.
   int resending_plugin_id;
 
+  DispatchType source_touch_event_dispatch_type;
+
   union {
     // Tap information must be set for GestureTap, GestureTapUnconfirmed,
     // and GestureDoubleTap events.
     struct {
       int tap_count;
       float width;
       float height;
     } tap;
 
     struct {
@@ skipping 90 matching lines @@
       float scale;
     } pinch_update;
   } data;
 
   WebGestureEvent(Type type, int modifiers, double time_stamp_seconds)
       : WebInputEvent(sizeof(WebGestureEvent),
                       type,
                       modifiers,
                       time_stamp_seconds),
         source_device(kWebGestureDeviceUninitialized),
-        resending_plugin_id(-1) {}
+        resending_plugin_id(-1),
+        source_touch_event_dispatch_type(kBlocking) {}
 
   WebGestureEvent()
       : WebInputEvent(sizeof(WebGestureEvent)),
         source_device(kWebGestureDeviceUninitialized),
-        resending_plugin_id(-1) {}
+        resending_plugin_id(-1),
+        source_touch_event_dispatch_type(kBlocking) {}
 
 #if INSIDE_BLINK
   BLINK_PLATFORM_EXPORT float DeltaXInRootFrame() const;
   BLINK_PLATFORM_EXPORT float DeltaYInRootFrame() const;
   BLINK_PLATFORM_EXPORT ScrollUnits DeltaUnits() const;
   BLINK_PLATFORM_EXPORT WebFloatPoint PositionInRootFrame() const;
   BLINK_PLATFORM_EXPORT float PinchScale() const;
   BLINK_PLATFORM_EXPORT InertialPhaseState InertialPhase() const;
   BLINK_PLATFORM_EXPORT bool Synthetic() const;
 
@@ skipping 45 matching lines @@
   }
 
 #endif
 };
 
 #pragma pack(pop)
 
 }  // namespace blink
 
 #endif  // WebGestureEvent_h