Report LatencyInfo through trace buffer

content/browser/renderer_host/input/touch_event_queue.h

 // Copyright 2013 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_INPUT_TOUCH_EVENT_QUEUE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EVENT_QUEUE_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 10 matching lines @@
 // Interface with which TouchEventQueue can forward touch events, and dispatch
 // touch event responses.
 class CONTENT_EXPORT TouchEventQueueClient {
  public:
   virtual ~TouchEventQueueClient() {}
 
   virtual void SendTouchEventImmediately(
       const TouchEventWithLatencyInfo& event) = 0;
 
   virtual void OnTouchEventAck(
-      const TouchEventWithLatencyInfo& event,
-      InputEventAckState ack_result) = 0;
+      const WebKit::WebTouchEvent& event,
+      InputEventAckState ack_result,
+      ui::LatencyInfo* latency) = 0;
 };
 
 // A queue for throttling and coalescing touch-events.
 class CONTENT_EXPORT TouchEventQueue {
  public:
 
   // The |client| must outlive the TouchEventQueue.
   explicit TouchEventQueue(TouchEventQueueClient* client);
   virtual ~TouchEventQueue();
 
   // Adds an event to the queue. The event may be coalesced with previously
   // queued events (e.g. consecutive touch-move events can be coalesced into a
   // single touch-move event). The event may also be immediately forwarded to
   // the renderer (e.g. when there are no other queued touch event).
   void QueueEvent(const TouchEventWithLatencyInfo& event);
 
   // Notifies the queue that a touch-event has been processed by the renderer.
   // At this point, the queue may send one or more gesture events and/or
   // additional queued touch-events to the renderer.
   void ProcessTouchAck(InputEventAckState ack_result,
-                       const ui::LatencyInfo& latency_info);
+                       ui::LatencyInfo* latency_info);
 
   // Empties the queue of touch events. This may result in any number of gesture
   // events being sent to the renderer.
   void FlushQueue();
 
   // Returns whether the event-queue is empty.
   bool empty() const WARN_UNUSED_RESULT {
     return touch_queue_.empty();
   }
 
@@ skipping 11 matching lines @@
   const TouchEventWithLatencyInfo& GetLatestEvent() const;
 
   // Walks the queue, checking each event for |ShouldForwardToRenderer()|.
   // If true, forwards the touch event and stops processing further events.
   // If false, acks the event with |INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS|.
   void TryForwardNextEventToRenderer();
 
   // Pops the touch-event from the top of the queue and sends it to the
   // TouchEventQueueClient. This reduces the size of the queue by one.
   void PopTouchEventToClient(InputEventAckState ack_result,
-                             const ui::LatencyInfo& renderer_latency_info);
+                             ui::LatencyInfo* renderer_latency_info);
 
   bool ShouldForwardToRenderer(const WebKit::WebTouchEvent& event) const;
 
   // Handles touch event forwarding and ack'ed event dispatch.
   TouchEventQueueClient* client_;
 
   typedef std::deque<CoalescedWebTouchEvent*> TouchQueue;
   TouchQueue touch_queue_;
 
   // Maintain the ACK status for each touch point.
   typedef std::map<int, InputEventAckState> TouchPointAckStates;
   TouchPointAckStates touch_ack_states_;
 
   // Used to defer touch forwarding when ack dispatch triggers |QueueEvent()|.
   bool dispatching_touch_ack_;
 
   // Don't send touch move events to renderer. This is enabled when the page
   // is scrolling. This behaviour is currently enabled only on aura behind a
   // flag.
   bool no_touch_move_to_renderer_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchEventQueue);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EVENT_QUEUE_H_