gpu: Fix dependency cycle between service_sources and config_sources.

gpu/config/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")
 
 declare_args() {
   # Use the PCI lib to collect GPU information on Linux.
   use_libpci = true
 }
@@ skipping 31 matching lines @@
     "gpu_info.h",
     "gpu_info_collector.cc",
     "gpu_info_collector.h",
     "gpu_info_collector_android.cc",
     "gpu_info_collector_linux.cc",
     "gpu_info_collector_linux.h",
     "gpu_info_collector_mac.mm",
     "gpu_info_collector_ozone.cc",
     "gpu_info_collector_win.cc",
     "gpu_info_collector_x11.cc",
+    "gpu_switches.cc",
+    "gpu_switches.h",
     "gpu_test_config.cc",
     "gpu_test_config.h",
     "gpu_test_expectations_parser.cc",
     "gpu_test_expectations_parser.h",
     "gpu_util.cc",
     "gpu_util.h",
     "software_rendering_list_json.cc",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
     "//gpu:gpu_implementation",
   ]
 
   deps = [
     "//base",
-    "//gpu/command_buffer/service:service_sources",
     "//third_party/re2",
     "//ui/gl",
   ]
 
   # Prefer mesa GL headers to system headers, which cause problems on Win.
   include_dirs = [ "//third_party/mesa/src/include" ]
 
   if (is_win) {
     deps += [ "//third_party/libxml" ]
     libs = [
@@ skipping 23 matching lines @@
       "//third_party/libXNVCtrl",
       "//ui/gfx/x",
     ]
   } else {
     sources -= [ "gpu_info_collector_x11.cc" ]
   }
   if (!use_ozone) {
     sources -= [ "gpu_info_collector_ozone.cc" ]
   }
 }