[cc] Plumb BeginFrameAcks through SurfaceManager to DisplayScheduler.

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

Index: content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
index c8af7c661bcb94e34bf37b77f6fa803e15ca25fb..e9c2d65ad03608a1502df447d5e47c0a371e949c 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
@@ -285,8 +285,6 @@ class TestWindowObserver : public aura::WindowObserver {
 
 class FakeSurfaceObserver : public cc::SurfaceObserver {
  public:
-  void OnSurfaceCreated(const cc::SurfaceInfo& surface_info) override {}
-
   void OnSurfaceDamaged(const cc::SurfaceId& id, bool* changed) override {
     *changed = true;
   }