Move surface reference code to CompositorFrameSinkSupport.

components/display_compositor/gpu_compositor_frame_sink.cc

Index: components/display_compositor/gpu_compositor_frame_sink.cc
diff --git a/components/display_compositor/gpu_compositor_frame_sink.cc b/components/display_compositor/gpu_compositor_frame_sink.cc
index 9a6347f146602e13ddc0e7a36ba5759fb34f825f..9e98a3b76af42dd16277bcf65b51c428e2afc9d6 100644
--- a/components/display_compositor/gpu_compositor_frame_sink.cc
+++ b/components/display_compositor/gpu_compositor_frame_sink.cc
@@ -24,7 +24,6 @@ GpuCompositorFrameSink::GpuCompositorFrameSink(
                std::move(display),
                std::move(begin_frame_source)),
       surface_manager_(surface_manager),
-      surface_tracker_(frame_sink_id),
       client_(std::move(client)),
       compositor_frame_sink_private_binding_(
           this,
@@ -34,17 +33,7 @@ GpuCompositorFrameSink::GpuCompositorFrameSink(
                  base::Unretained(this)));
 }
 
-GpuCompositorFrameSink::~GpuCompositorFrameSink() {
-  // For display root surfaces, remove the reference from top level root to
-  // indicate the display root surface is no longer visible.
-  if (support_.display() && surface_tracker_.current_surface_id().is_valid()) {
-    const cc::SurfaceId top_level_root_surface_id =
-        surface_manager_->GetRootSurfaceId();
-    std::vector<cc::SurfaceReference> references_to_remove{cc::SurfaceReference(
-        top_level_root_surface_id, surface_tracker_.current_surface_id())};
-    surface_manager_->RemoveSurfaceReferences(references_to_remove);
-  }
-}
+GpuCompositorFrameSink::~GpuCompositorFrameSink() {}
 
 void GpuCompositorFrameSink::EvictFrame() {
   support_.EvictFrame();
@@ -57,43 +46,7 @@ void GpuCompositorFrameSink::SetNeedsBeginFrame(bool needs_begin_frame) {
 void GpuCompositorFrameSink::SubmitCompositorFrame(
     const cc::LocalSurfaceId& local_surface_id,
     cc::CompositorFrame frame) {
-  cc::SurfaceId start_surface_id = surface_tracker_.current_surface_id();
-  surface_tracker_.UpdateReferences(local_surface_id,
-                                    frame.metadata.referenced_surfaces);
-  // TODO(kylechar): Move adding top-level root references to
-  // GpuDisplayCompositorFrameSink.
-
   support_.SubmitCompositorFrame(local_surface_id, std::move(frame));
-
-  // Get the list of surfaces to add/remove from |surface_tracker_| so we can
-  // append to them before adding/removing.
-  std::vector<cc::SurfaceReference>& references_to_add =
-      surface_tracker_.references_to_add();
-  std::vector<cc::SurfaceReference>& references_to_remove =
-      surface_tracker_.references_to_remove();
-
-  // Append TLR references for the display root surfaces when display root
-  // surface changes.
-  if (support_.display() &&
-      start_surface_id != surface_tracker_.current_surface_id()) {
-    const cc::SurfaceId top_level_root_surface_id =
-        surface_manager_->GetRootSurfaceId();
-
-    // The first frame will not have a valid |start_surface_id| and there will
-    // be no surface to remove.
-    if (start_surface_id.local_surface_id().is_valid()) {
-      references_to_remove.push_back(
-          cc::SurfaceReference(top_level_root_surface_id, start_surface_id));
-    }
-
-    references_to_add.push_back(cc::SurfaceReference(
-        top_level_root_surface_id, surface_tracker_.current_surface_id()));
-  }
-
-  if (!references_to_add.empty())
-    surface_manager_->AddSurfaceReferences(references_to_add);
-  if (!references_to_remove.empty())
-    surface_manager_->RemoveSurfaceReferences(references_to_remove);
 }
 
 void GpuCompositorFrameSink::Require(const cc::LocalSurfaceId& local_surface_id,