Fix latency calculation when multiple rendered buffers are in flight.

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 ac571dc920be90b08a12a5c52a04f7a414eb1027..3f06d1acb9439d39ffce98a26d2dd329e4d4f7d8 100644
--- a/content/common/gpu/image_transport_surface.h
+++ b/content/common/gpu/image_transport_surface.h
@@ -196,7 +196,7 @@ class PassThroughImageTransportSurface
   // If updated vsync parameters can be determined, send this information to
   // the browser.
   virtual void SendVSyncUpdateIfAvailable();
-  void SwapBuffersCallBack();
+  void SwapBuffersCallBack(std::vector<ui::LatencyInfo> latency_info);
 
   ImageTransportHelper* GetHelper() { return helper_.get(); }