Revert of FrameGenerator should not be created until an AcceleratedWidget is available

services/ui/ws/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")
 import("//testing/test.gni")
 import("//services/catalog/public/tools/catalog.gni")
 import("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//services/service_manager/public/tools/test/service_test.gni")
@@ skipping 195 matching lines @@
 
 service_test("mus_ws_unittests") {
   sources = [
     "cursor_location_manager_unittest.cc",
     "cursor_unittest.cc",
     "display_unittest.cc",
     "drag_controller_unittest.cc",
     "event_dispatcher_unittest.cc",
     "event_matcher_unittest.cc",
     "focus_controller_unittest.cc",
+    "frame_generator_unittest.cc",
     "server_window_compositor_frame_sink_manager_test_api.cc",
     "server_window_compositor_frame_sink_manager_test_api.h",
     "server_window_drawn_tracker_unittest.cc",
     "test_server_window_delegate.cc",
     "test_server_window_delegate.h",
     "test_utils.cc",
     "test_utils.h",
     "transient_windows_unittest.cc",
     "user_activity_monitor_unittest.cc",
     "user_display_manager_unittest.cc",
@@ skipping 39 matching lines @@
 service_manifest("mus_ws_unittests_app_manifest") {
   name = "mus_ws_unittests_app"
   source = "mus_ws_unittests_app_manifest.json"
 }
 
 catalog("mus_ws_unittests_catalog") {
   embedded_services = [ ":mus_ws_unittests_app_manifest" ]
 
   standalone_services = [ "//services/ui:manifest" ]
 }