Add latency measurement system

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 23 matching lines @@
 struct ViewHostMsg_UpdateRect_Params;
 struct ViewHostMsg_TextInputState_Params;
 struct ViewHostMsg_BeginSmoothScroll_Params;
 
 namespace base {
 class TimeTicks;
 }
 
 namespace cc {
 class CompositorFrame;
+struct LatencyInfo;
 }
 
 namespace ui {
 class KeyEvent;
 class Range;
 }
 
 namespace WebKit {
 class WebInputEvent;
 class WebMouseEvent;
@@ skipping 342 matching lines @@
   // nothing if the compositor thread is enabled.
   // TODO(jbates) Once the compositor thread is always on, this can be removed.
   void AcknowledgeSwapBuffersToRenderer();
 
 #if defined(USE_AURA)
   // Called by the view when the parent changes. If a parent isn't available,
   // NULL is used.
   void ParentChanged(gfx::NativeViewId new_parent);
 #endif
 
+  static void NotifyFrameDisplayed(
+      int route_id,
+      int gpu_host_id,
+      const cc::LatencyInfo& latency_info);
+
   // Signals that the compositing surface was updated, e.g. after a lost context
   // event.
   void CompositingSurfaceUpdated();
 
   void set_allow_privileged_mouse_lock(bool allow) {
     allow_privileged_mouse_lock_ = allow;
   }
 
   // Resets state variables related to tracking pending size and painting.
   //
@@ skipping 249 matching lines @@
   void ProcessTouchAck(InputEventAckState ack_result);
 
   // Called when there is a new auto resize (using a post to avoid a stack
   // which may get in recursive loops).
   void DelayedAutoResized();
 
   // Called periodically to advance the active scroll gesture after being
   // initiated by OnBeginSmoothScroll.
   void TickActiveSmoothScrollGesture();
 
+  // Called when an input event has arrived, to increment the input number id.
+  void IncrementInputNumber();
+
+  // Called before a message is sent that should cause the renderer to produce
+  // a new frame.
+  void SendStartFrame();
+
   // Our delegate, which wants to know mainly about keyboard events.
   // It will remain non-NULL until DetachDelegate() is called.
   RenderWidgetHostDelegate* delegate_;
 
   // Created during construction but initialized during Init*(). Therefore, it
   // is guaranteed never to be NULL, but its channel may be NULL if the
   // renderer crashed, so you must always check that.
   RenderProcessHost* process_;
 
   // The ID of the corresponding object in the Renderer Instance.
@@ skipping 169 matching lines @@
   typedef std::map<int, scoped_refptr<SmoothScrollGesture> >
       SmoothScrollGestureMap;
   SmoothScrollGestureMap active_smooth_scroll_gestures_;
   base::TimeTicks last_smooth_scroll_gestures_tick_time_;
   bool tick_active_smooth_scroll_gestures_task_posted_;
 
   scoped_ptr<TouchEventQueue> touch_event_queue_;
   scoped_ptr<GestureEventFilter> gesture_event_filter_;
   scoped_ptr<OverscrollController> overscroll_controller_;
 
+  bool incremented_input_number_;
+  int64 current_input_number_;
+
 #if defined(OS_WIN)
   std::list<HWND> dummy_windows_for_activation_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_