Plumb cc::LatencyInfo through command buffer and output surface

content/common/gpu/client/command_buffer_proxy_impl.h

Index: content/common/gpu/client/command_buffer_proxy_impl.h
diff --git a/content/common/gpu/client/command_buffer_proxy_impl.h b/content/common/gpu/client/command_buffer_proxy_impl.h
index 95f3c60eb1dd6f5d341174254006af4f3be2bae5..f5e1675fe8f32c4f242e84d31e8d06147ca35124 100644
--- a/content/common/gpu/client/command_buffer_proxy_impl.h
+++ b/content/common/gpu/client/command_buffer_proxy_impl.h
@@ -16,6 +16,7 @@
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "cc/debug/latency_info.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
 #include "content/common/gpu/client/gpu_video_decode_accelerator_host.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
@@ -113,6 +114,8 @@ class CommandBufferProxyImpl
   void SetOnConsoleMessageCallback(
       const GpuConsoleMessageCallback& callback);
 
+  void SetLatencyInfo(const cc::LatencyInfo& latency_info);
+
   // TODO(apatrick): this is a temporary optimization while skia is calling
   // ContentGLContext::MakeCurrent prior to every GL call. It saves returning 6
   // ints redundantly when only the error is needed for the