Introduce DisplayCompositor Mojo API for Mus

components/mus/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("//build/config/ui.gni")
 
 source_set("surfaces") {
   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",
     "direct_output_surface.cc",
     "direct_output_surface.h",
     "display_compositor.cc",
     "display_compositor.h",
+    "display_compositor_impl.cc",
+    "display_compositor_impl.h",
+    "display_impl.cc",
+    "display_impl.h",
     "surfaces_context_provider.cc",
     "surfaces_context_provider.h",
     "surfaces_context_provider_delegate.h",
     "surfaces_state.cc",
     "surfaces_state.h",
     "top_level_display_client.cc",
     "top_level_display_client.h",
   ]
 
   deps = [
     "//base",
     "//cc",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//components/display_compositor",
     "//components/mus/gles2",
     "//components/mus/public/cpp/surfaces",
     "//components/mus/public/interfaces",
+    "//components/mus/public/interfaces/gpu:interfaces",
     "//gpu/command_buffer/client",
     "//gpu/command_buffer/client:gles2_cmd_helper",
     "//gpu/command_buffer/client:gles2_implementation",
     "//gpu/command_buffer/client:gles2_interface",
     "//services/shell/public/cpp",
     "//services/tracing/public/cpp",
     "//ui/gfx",
     "//ui/gfx/geometry/mojo",
     "//ui/gfx/geometry/mojo:interfaces",
     "//ui/gl",
   ]
 
   if (use_ozone) {
     sources += [
       "direct_output_surface_ozone.cc",
       "direct_output_surface_ozone.h",
       "ozone_gpu_memory_buffer_manager.cc",
       "ozone_gpu_memory_buffer_manager.h",
     ]
     deps += [ "//gpu/command_buffer/common" ]
   }
 }