Add latency measurement system

ui/compositor/compositor.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 UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 197 matching lines @@
   // Draws the scene created by the layer tree and any visual effects. If
   // |force_clear| is true, this will cause the compositor to clear before
   // compositing.
   void Draw(bool force_clear);
 
   // Where possible, draws are scissored to a damage region calculated from
   // changes to layer properties.  This bypasses that and indicates that
   // the whole frame needs to be drawn.
   void ScheduleFullDraw();
 
+  int64 SetInputNumber(int64 input_number);
+
   // Reads the region |bounds_in_pixel| of the contents of the last rendered
   // frame into the given bitmap.
   // Returns false if the pixels could not be read.
   bool ReadPixels(SkBitmap* bitmap, const gfx::Rect& bounds_in_pixel);
 
   // Sets the compositor's device scale factor and size.
   void SetScaleAndSize(float scale, const gfx::Size& size_in_pixel);
 
   // Returns the size of the widget that is being drawn to in pixel coordinates.
   const gfx::Size& size() const { return size_; }
@@ skipping 33 matching lines @@
   virtual scoped_ptr<cc::OutputSurface>
       createOutputSurface() OVERRIDE;
   virtual void didRecreateOutputSurface(bool success) OVERRIDE;
   virtual scoped_ptr<cc::InputHandler> createInputHandler() OVERRIDE;
   virtual void willCommit() OVERRIDE;
   virtual void didCommit() OVERRIDE;
   virtual void didCommitAndDrawFrame() OVERRIDE;
   virtual void didCompleteSwapBuffers() OVERRIDE;
   virtual void scheduleComposite() OVERRIDE;
   virtual scoped_ptr<cc::FontAtlas> createFontAtlas() OVERRIDE;
-
+  virtual void onReceivedLatencyInfo(
+    const cc::LatencyInfo& latencyInfo) OVERRIDE;
 
   int last_started_frame() { return last_started_frame_; }
   int last_ended_frame() { return last_ended_frame_; }
 
   bool IsLocked() { return compositor_lock_ != NULL; }
 
  private:
   friend class base::RefCounted<Compositor>;
   friend class CompositorLock;
 
@@ skipping 21 matching lines @@
   // Used to verify that we have at most one draw swap in flight.
   scoped_ptr<PostedSwapQueue> posted_swaps_;
 
   // The device scale factor of the monitor that this compositor is compositing
   // layers on.
   float device_scale_factor_;
 
   int last_started_frame_;
   int last_ended_frame_;
 
+  int64 frame_number_;
+
   bool disable_schedule_composite_;
 
   CompositorLock* compositor_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_