[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 4cefc3414fbff56fd901ad0531a5c6027fcf9ee3..0e184e3df93b6b570367c08b3269b285d8fdc313 100644
--- a/third_party/WebKit/public/platform/WebGestureEvent.h
+++ b/third_party/WebKit/public/platform/WebGestureEvent.h
@@ -37,6 +37,7 @@ class WebGestureEvent : public WebInputEvent {
   int global_x;
   int global_y;
   WebGestureDevice source_device;
+  bool is_source_touch_event_set_non_blocking;

[pfeldman, 2017/06/15 18:56:42]

lgtm. btw, in c++11 you can do bool is_source_touch_event_set_non_blocking =
false;

[dtapuska, 2017/06/15 19:18:29]

Actually the initializer false, isn't needed here... This struct is actually
memset(0) in the WebInputEvent ctor.. So chong you can remove the
is_source_touch_event_set_non_blocking in the ctors...

[chongz, 2017/06/15 19:37:36]

Removed. Confirmed with dtapuska offline and the TODO about removing |memset|
won't affect decision here.

 
   // If the WebGestureEvent has sourceDevice=WebGestureDeviceTouchscreen, this
   // field contains the unique identifier for the touch event that released
@@ -164,11 +165,13 @@ class WebGestureEvent : public WebInputEvent {
                       modifiers,
                       time_stamp_seconds),
         source_device(kWebGestureDeviceUninitialized),
+        is_source_touch_event_set_non_blocking(false),
         resending_plugin_id(-1) {}
 
   WebGestureEvent()
       : WebInputEvent(sizeof(WebGestureEvent)),
         source_device(kWebGestureDeviceUninitialized),
+        is_source_touch_event_set_non_blocking(false),
         resending_plugin_id(-1) {}
 
 #if INSIDE_BLINK