cc: Introduce BeginFrame sequence numbers and acknowledgements.

cc/output/direct_renderer.h

Index: cc/output/direct_renderer.h
diff --git a/cc/output/direct_renderer.h b/cc/output/direct_renderer.h
index 2bf0c9c39ff8f598259d2514f6f300c064f47322..d7ab11c340cb9c699ac4cf2afe330427d2fc2bc2 100644
--- a/cc/output/direct_renderer.h
+++ b/cc/output/direct_renderer.h
@@ -12,6 +12,7 @@
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/ca_layer_overlay.h"
+#include "cc/output/output_surface_frame.h"
 #include "cc/output/overlay_processor.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/resources/resource_provider.h"
@@ -57,7 +58,7 @@ class CC_EXPORT DirectRenderer {
                  const gfx::Size& device_viewport_size);
 
   // Public interface implemented by subclasses.
-  virtual void SwapBuffers(std::vector<ui::LatencyInfo> latency_info) = 0;
+  virtual void SwapBuffers(OutputSurfaceFrame output_frame) = 0;
   virtual void SwapBuffersComplete() {}
   virtual void DidReceiveTextureInUseResponses(
       const gpu::TextureInUseResponses& responses) {}