Plumb cc::LatencyInfo through command buffer and output surface

content/common/gpu/image_transport_surface.h

Index: content/common/gpu/image_transport_surface.h
diff --git a/content/common/gpu/image_transport_surface.h b/content/common/gpu/image_transport_surface.h
index f1736c22f2207b7d6b791e2067767d11d6e01964..503a411e12f87505b81e0141bdf380528fc8a6cb 100644
--- a/content/common/gpu/image_transport_surface.h
+++ b/content/common/gpu/image_transport_surface.h
@@ -12,6 +12,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "cc/debug/latency_info.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_message.h"
@@ -63,6 +64,8 @@ class ImageTransportSurface {
       const AcceleratedSurfaceMsg_BufferPresented_Params& params) = 0;
   virtual void OnResizeViewACK() = 0;
   virtual void OnResize(gfx::Size size) = 0;
+  virtual void SetLatencyInfo(
+      const cc::LatencyInfo& latency_info) = 0;
 
   // Creates a surface with the given attributes.
   static scoped_refptr<gfx::GLSurface> CreateSurface(
@@ -124,6 +127,8 @@ class ImageTransportHelper
   void SendUpdateVSyncParameters(
       base::TimeTicks timebase, base::TimeDelta interval);
 
+  void SendLatencyInfo(const cc::LatencyInfo& latency_info);
+
   // Whether or not we should execute more commands.
   void SetScheduled(bool is_scheduled);
 
@@ -155,6 +160,8 @@ class ImageTransportHelper
   // Backbuffer resize callback.
   void Resize(gfx::Size size);
 
+  void SetLatencyInfo(const cc::LatencyInfo& latency_info);
+
   // Weak pointers that point to objects that outlive this helper.
   ImageTransportSurface* surface_;
   GpuChannelManager* manager_;
@@ -191,6 +198,8 @@ class PassThroughImageTransportSurface
   virtual void OnResizeViewACK() OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
   virtual gfx::Size GetSize() OVERRIDE;
+  virtual void SetLatencyInfo(
+      const cc::LatencyInfo& latency_info) OVERRIDE;
 
  protected:
   virtual ~PassThroughImageTransportSurface();
@@ -206,6 +215,7 @@ class PassThroughImageTransportSurface
   bool did_set_swap_interval_;
   bool did_unschedule_;
   bool is_swap_buffers_pending_;
+  cc::LatencyInfo latency_info_;
 
   DISALLOW_COPY_AND_ASSIGN(PassThroughImageTransportSurface);
 };