Plumb cc::LatencyInfo through command buffer and output surface

cc/output/output_surface.h

Index: cc/output/output_surface.h
diff --git a/cc/output/output_surface.h b/cc/output/output_surface.h
index e23aaafa15a7430df04d5c2ce8cae4503e5a7d80..2e7a190c6a51a73327cec0493a06a1dc8f851e90 100644
--- a/cc/output/output_surface.h
+++ b/cc/output/output_surface.h
@@ -20,6 +20,7 @@ namespace cc {
 
 class CompositorFrame;
 class OutputSurfaceClient;
+struct LatencyInfo;
 
 // Represents the output surface for a compositor. The compositor owns
 // and manages its destruction. Its lifetime is:
@@ -82,8 +83,8 @@ class CC_EXPORT OutputSurface {
 
   virtual void BindFramebuffer();
 
-  virtual void PostSubBuffer(gfx::Rect rect);
-  virtual void SwapBuffers();
+  virtual void PostSubBuffer(gfx::Rect rect, const LatencyInfo&);
+  virtual void SwapBuffers(const LatencyInfo&);
 
   // Notifies frame-rate smoothness preference. If true, all non-critical
   // processing should be stopped, or lowered in priority.