[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 3694c7968fe6c78e9840593a7210d5a710739db2..0b9cc76a463a56fc00815b17cba5f835fecdcdb5 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
@@ -290,6 +290,9 @@ class FakeSurfaceObserver : public cc::SurfaceObserver {
   void OnSurfaceDamaged(const cc::SurfaceId& id, bool* changed) override {
     *changed = true;
   }
+
+  void OnSurfaceProducerStateChanged(const cc::SurfaceId& surface_id) override {
+  }
 };
 
 class FakeFrameSubscriber : public RenderWidgetHostViewFrameSubscriber {