Adds BeginFrameControl via DevTools.

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.
 
 source_set("surface_id") {
   sources = [
     "frame_sink_id.h",
     "local_frame_id.h",
     "surface_id.h",
     "surface_sequence.h",
     "surface_sequence_generator.cc",
     "surface_sequence_generator.h",
   ]
 
   deps = [
     "//base",
   ]
 }
 
 component("surfaces") {
   output_name = "cc_surfaces"
   sources = [
     "direct_compositor_frame_sink.cc",
     "direct_compositor_frame_sink.h",
     "display.cc",
     "display.h",
+    "display_begin_frame_source.cc",
+    "display_begin_frame_source.h",
     "display_client.h",
     "display_scheduler.cc",
     "display_scheduler.h",
     "surface.cc",
     "surface.h",
     "surface_aggregator.cc",
     "surface_aggregator.h",
     "surface_factory.cc",
     "surface_factory.h",
     "surface_factory_client.h",
@@ skipping 24 matching lines @@
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   if (is_android && !is_debug) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 }