core_services: Add mojo:surfaces_service to core_services.

components/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("//third_party/mojo/src/mojo/public/mojo_application.gni")
 
 mojo_native_application("surfaces") {
   output_name = "surfaces_service"
   sources = [
-    "context_provider_mojo.cc",
-    "context_provider_mojo.h",
+    "main.cc",
+  ]
+
+  deps = [
+    ":lib",
+    "//mojo/environment:chromium",
+    "//third_party/mojo/src/mojo/public/cpp/system",
+  ]
+}
+
+source_set("lib") {
+  sources = [
     "display_factory_impl.cc",
     "display_factory_impl.h",
     "display_impl.cc",
     "display_impl.h",
+    "surfaces_context_provider.cc",
+    "surfaces_context_provider.h",
     "surfaces_impl.cc",
     "surfaces_impl.h",
     "surfaces_output_surface.cc",
     "surfaces_output_surface.h",
     "surfaces_scheduler.cc",
     "surfaces_scheduler.h",
     "surfaces_service_application.cc",
     "surfaces_service_application.h",
   ]
 
   deps = [
     "//base",
     "//cc",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//components/gpu/public/interfaces",
     "//components/surfaces/public/interfaces",
     "//gpu/command_buffer/client:gles2_interface",
     "//mojo/application",
     "//mojo/common",
     "//mojo/common:tracing_impl",
     "//mojo/converters/geometry",
     "//mojo/converters/surfaces",
-    "//mojo/environment:chromium",
     "//third_party/mojo/src/mojo/public/c/gles2",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
     "//third_party/mojo/src/mojo/public/cpp/environment",
-    "//third_party/mojo/src/mojo/public/cpp/system",
     "//ui/gfx/geometry",
     "//ui/mojo/geometry:interfaces",
   ]
 }