[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 19 matching lines @@
     kMomentumPhase,             // Momentum phase.
   };
 
   // TODO(mustaq): Make these coordinates private & fractional, as in
   // WebMouseEvent.h .
   int x;
   int y;
   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
   // this event at TouchDispositionGestureFilter. If the WebGestureEvents was
   // not released through a touch event (e.g. timer-released gesture events or
   // gesture events with sourceDevice!=WebGestureDeviceTouchscreen), the field
   // contains 0. See crbug.com/618738.
   uint32_t unique_touch_event_id;
 
   // This field exists to allow BrowserPlugin to mark GestureScroll events as
@@ skipping 107 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),
+        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
   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 58 matching lines @@
         return false;
     }
   }
 };
 
 #pragma pack(pop)
 
 }  // namespace blink
 
 #endif  // WebGestureEvent_h