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

third_party/WebKit/public/platform/WebGestureEvent.h

Index: third_party/WebKit/public/platform/WebGestureEvent.h
diff --git a/third_party/WebKit/public/platform/WebGestureEvent.h b/third_party/WebKit/public/platform/WebGestureEvent.h
index 797e62004be43b39584ed9bb3c7503541c771fb7..920ceae6a28b675d489d5a92c7d359e8ec309edc 100644
--- a/third_party/WebKit/public/platform/WebGestureEvent.h
+++ b/third_party/WebKit/public/platform/WebGestureEvent.h
@@ -53,6 +53,8 @@ class WebGestureEvent : public WebInputEvent {
   // 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.
@@ -163,12 +165,14 @@ class WebGestureEvent : public WebInputEvent {
                       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;