Revert of cc::SurfaceDependencyTracker should not crash when a Display goes away

cc/surfaces/surface_manager.cc

Index: cc/surfaces/surface_manager.cc
diff --git a/cc/surfaces/surface_manager.cc b/cc/surfaces/surface_manager.cc
index 5cacbc97213ab35ae496598befc55efd6daae858..cbdb78c5ea4a061887bcfc14fb2f627904fafd3f 100644
--- a/cc/surfaces/surface_manager.cc
+++ b/cc/surfaces/surface_manager.cc
@@ -65,8 +65,8 @@
 #endif
 
 void SurfaceManager::SetDependencyTracker(
-    SurfaceDependencyTracker* dependency_tracker) {
-  dependency_tracker_ = dependency_tracker;
+    std::unique_ptr<SurfaceDependencyTracker> dependency_tracker) {
+  dependency_tracker_ = std::move(dependency_tracker);
 }
 
 void SurfaceManager::RequestSurfaceResolution(Surface* pending_surface) {
@@ -431,10 +431,6 @@
   framesink_manager_.UnregisterBeginFrameSource(source);
 }
 
-BeginFrameSource* SurfaceManager::GetPrimaryBeginFrameSource() {
-  return framesink_manager_.GetPrimaryBeginFrameSource();
-}
-
 void SurfaceManager::RegisterFrameSinkHierarchy(
     const FrameSinkId& parent_frame_sink_id,
     const FrameSinkId& child_frame_sink_id) {