Surface Synchronization: Distinguish between dependencies and references

cc/surfaces/compositor_frame_sink_support.cc

Index: cc/surfaces/compositor_frame_sink_support.cc
diff --git a/cc/surfaces/compositor_frame_sink_support.cc b/cc/surfaces/compositor_frame_sink_support.cc
index 093c5b60d9469aec4fede331dbfb8dd307b3ff5a..453b0e36d7f41201baad9dcbbe78fbf071698a8c 100644
--- a/cc/surfaces/compositor_frame_sink_support.cc
+++ b/cc/surfaces/compositor_frame_sink_support.cc
@@ -60,8 +60,7 @@ CompositorFrameSinkSupport::~CompositorFrameSinkSupport() {
 
 void CompositorFrameSinkSupport::ReferencedSurfacesChanged(
     const LocalSurfaceId& local_surface_id,
-    const std::vector<SurfaceId>* active_referenced_surfaces,
-    const std::vector<SurfaceId>* pending_referenced_surfaces) {
+    const std::vector<SurfaceId>* active_referenced_surfaces) {
   if (!surface_manager_->using_surface_references())
     return;
 
@@ -72,8 +71,7 @@ void CompositorFrameSinkSupport::ReferencedSurfacesChanged(
   // surface references includes references from both the pending and active
   // frame if any.
   reference_tracker_.UpdateReferences(local_surface_id,
-                                      active_referenced_surfaces,
-                                      pending_referenced_surfaces);
+                                      active_referenced_surfaces);
 
   UpdateSurfaceReferences(last_surface_id, local_surface_id);
 }