Report LatencyInfo through trace buffer

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 733 matching lines @@
       const TouchEventWithLatencyInfo& touch_event) OVERRIDE;
   virtual bool OnSendGestureEventImmediately(
       const GestureEventWithLatencyInfo& gesture_event) OVERRIDE;
   virtual void SetNeedsFlush() OVERRIDE;
   virtual void DidFlush() OVERRIDE;
 
   // InputAckHandler
   virtual void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
                                   InputEventAckState ack_result) OVERRIDE;
   virtual void OnWheelEventAck(const WebKit::WebMouseWheelEvent& event,
-                               InputEventAckState ack_result) OVERRIDE;
-  virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
-                               InputEventAckState ack_result) OVERRIDE;
+                               InputEventAckState ack_result,
+                               ui::LatencyInfo* latency) OVERRIDE;

[jdduke (slow), 2013/10/08 16:28:08]

Please undo these arg changes.

[Yufeng Shen (Slow to review), 2013/10/08 19:35:59]

Done.

+  virtual void OnTouchEventAck(const WebKit::WebTouchEvent& event,
+                               InputEventAckState ack_result,
+                               ui::LatencyInfo* latency) OVERRIDE;
   virtual void OnGestureEventAck(const WebKit::WebGestureEvent& event,
-                                 InputEventAckState ack_result) OVERRIDE;
+                                 InputEventAckState ack_result,
+                                 ui::LatencyInfo* latency) OVERRIDE;
   virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) OVERRIDE;
 
   void SimulateTouchGestureWithMouse(const WebKit::WebMouseEvent& mouse_event);
 
   // Called when there is a new auto resize (using a post to avoid a stack
   // which may get in recursive loops).
   void DelayedAutoResized();
 
   // Our delegate, which wants to know mainly about keyboard events.
   // It will remain non-NULL until DetachDelegate() is called.
@@ skipping 168 matching lines @@
   int64 last_input_number_;
 
   BrowserRenderingStats rendering_stats_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_