Move part of display_compositor's interface to cc/ipc

services/ui/gpu/display_compositor/BUILD.gn

 # Copyright 2016 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("//build/config/ui.gni")
 
 source_set("display_compositor") {
   sources = [
     "compositor_frame_sink_delegate.h",
     "compositor_frame_sink_factory_impl.cc",
     "compositor_frame_sink_factory_impl.h",
     "compositor_frame_sink_impl.cc",
     "compositor_frame_sink_impl.h",
     "display_compositor_impl.cc",
     "display_compositor_impl.h",
     "display_impl.cc",
     "display_impl.h",
   ]
 
   deps = [
     "//base",
     "//cc",
+    "//cc/ipc:interfaces",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//services/ui/public/interfaces/gpu:interfaces",
 
     # TODO(fsamuel): Remove this dependency.
     "//services/ui/surfaces",
   ]
 }