Add latency measurement system

content/common/gpu/texture_image_transport_surface.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_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
 #define CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
 
 #include "base/basictypes.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
 #include "content/common/gpu/image_transport_surface.h"
@@ skipping 34 matching lines @@
   virtual void* GetDisplay() OVERRIDE;
   virtual void* GetConfig() OVERRIDE;
 
  protected:
   // ImageTransportSurface implementation.
   virtual void OnBufferPresented(
       uint64 surface_handle,
       uint32 sync_point) OVERRIDE;
   virtual void OnResizeViewACK() OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
+  virtual void SetLatencyInfo(
+      const WebKit::WebLatencyInfoImpl& latency_info) OVERRIDE;
 
   // GpuCommandBufferStub::DestructionObserver implementation.
   virtual void OnWillDestroyStub(GpuCommandBufferStub* stub) OVERRIDE;
 
  private:
   // A texture backing the front/back buffer.
   struct Texture {
     Texture();
     ~Texture();
 
@@ skipping 52 matching lines @@
 
   // Whether we unscheduled command buffer because of pending SwapBuffers.
   bool did_unschedule_;
 
   // The mailbox names used for texture exchange. Uses surface_handle as key.
   gpu::gles2::MailboxName mailbox_names_[2];
 
   // Holds a reference to the mailbox manager for cleanup.
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 
+  WebKit::WebLatencyInfoImpl latency_info_;
   DISALLOW_COPY_AND_ASSIGN(TextureImageTransportSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_