Clean up Mac swap acknowledgement code

content/browser/compositor/image_transport_factory.h

Index: content/browser/compositor/image_transport_factory.h
diff --git a/content/browser/compositor/image_transport_factory.h b/content/browser/compositor/image_transport_factory.h
index a5cd0898b5afbff13781f67c6558206278e7f853..bc19afe3fb0758f0526aba5d507264d37c421524 100644
--- a/content/browser/compositor/image_transport_factory.h
+++ b/content/browser/compositor/image_transport_factory.h
@@ -11,6 +11,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "content/common/content_export.h"
+#include "ui/events/latency_info.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace cc {
@@ -19,6 +20,7 @@ class SurfaceManager;
 
 namespace gfx {
 class Size;
+enum class SwapResult;
 }
 
 namespace ui {
@@ -83,7 +85,11 @@ class CONTENT_EXPORT ImageTransportFactory {
   virtual void RemoveObserver(ImageTransportFactoryObserver* observer) = 0;
 
 #if defined(OS_MACOSX)
-  virtual void OnSurfaceDisplayed(int surface_id) = 0;
+  virtual void OnGpuSwapBuffersCompleted(
+      int surface_id,
+      const std::vector<ui::LatencyInfo>& latency_info,
+      gfx::SwapResult result) = 0;
+
   // Called with |suspended| as true when the ui::Compositor has been
   // disconnected from an NSView and may be attached to another one. Called
   // with |suspended| as false after the ui::Compositor has been connected to