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

cc/surfaces/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//cc/cc.gni")
 
 cc_source_set("surface_id") {
   sources = [
     "frame_sink_id.cc",
     "frame_sink_id.h",
@@ skipping 32 matching lines @@
     "display.cc",
     "display.h",
     "display_client.h",
     "display_scheduler.cc",
     "display_scheduler.h",
     "frame_sink_manager.cc",
     "frame_sink_manager.h",
     "frame_sink_manager_client.h",
     "local_surface_id_allocator.cc",
     "local_surface_id_allocator.h",
+    "primary_begin_frame_source.cc",
+    "primary_begin_frame_source.h",
     "referenced_surface_tracker.cc",
     "referenced_surface_tracker.h",
     "sequence_surface_reference_factory.cc",
     "sequence_surface_reference_factory.h",
     "surface.cc",
     "surface.h",
     "surface_aggregator.cc",
     "surface_aggregator.h",
     "surface_dependency_tracker.cc",
     "surface_dependency_tracker.h",
@@ skipping 20 matching lines @@
     "//cc",
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/command_buffer/common",
     "//gpu/vulkan:features",
     "//skia",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/latency",
   ]
 }