gpu: Fix dependency cycle between service_sources and config_sources.

gpu/gpu_config.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../third_party/re2/re2.gyp:re2',
     '../base/base.gyp:base',
     '../ui/gl/gl.gyp:gl',
   ],
@@ skipping 18 matching lines @@
     'config/gpu_info.h',
     'config/gpu_info_collector.cc',
     'config/gpu_info_collector.h',
     'config/gpu_info_collector_android.cc',
     'config/gpu_info_collector_linux.cc',
     'config/gpu_info_collector_linux.h',
     'config/gpu_info_collector_mac.mm',
     'config/gpu_info_collector_ozone.cc',
     'config/gpu_info_collector_win.cc',
     'config/gpu_info_collector_x11.cc',
+    'config/gpu_switches.cc',
+    'config/gpu_switches.h',
     'config/gpu_test_config.cc',
     'config/gpu_test_config.h',
     'config/gpu_test_expectations_parser.cc',
     'config/gpu_test_expectations_parser.h',
     'config/gpu_util.cc',
     'config/gpu_util.h',
     'config/software_rendering_list_json.cc',
   ],
   'conditions': [
     ['OS=="win"', {
@@ skipping 23 matching lines @@
     ['OS=="linux" and use_x11==1', {
       'dependencies': [
         '../build/linux/system.gyp:x11',
         '../build/linux/system.gyp:xext',
         '../third_party/libXNVCtrl/libXNVCtrl.gyp:libXNVCtrl',
         '../ui/gfx/x/gfx_x11.gyp:gfx_x11',
       ],
     }],
   ],
 }