Add latency measurement system

content/common/gpu/texture_image_transport_surface.h

Index: content/common/gpu/texture_image_transport_surface.h
diff --git a/content/common/gpu/texture_image_transport_surface.h b/content/common/gpu/texture_image_transport_surface.h
index 1bb53597b6f5fce3ffa74056fc30bec95c23737b..24205c9eb1fc98ca8ae33b6b9cb99034af8e9cf1 100644
--- a/content/common/gpu/texture_image_transport_surface.h
+++ b/content/common/gpu/texture_image_transport_surface.h
@@ -51,6 +51,8 @@ class TextureImageTransportSurface :
       const AcceleratedSurfaceMsg_BufferPresented_Params& params) OVERRIDE;
   virtual void OnResizeViewACK() OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
+  virtual void SetLatencyInfo(
+      const cc::LatencyInfo& latency_info) OVERRIDE;
 
   // GpuCommandBufferStub::DestructionObserver implementation.
   virtual void OnWillDestroyStub(GpuCommandBufferStub* stub) OVERRIDE;
@@ -116,6 +118,7 @@ class TextureImageTransportSurface :
   // Holds a reference to the mailbox manager for cleanup.
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 
+  cc::LatencyInfo latency_info_;
   DISALLOW_COPY_AND_ASSIGN(TextureImageTransportSurface);
 };