Add missing files/deps/defines

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")
 
 source_set("config") {
   sources = [
     "dx_diag_node.cc",
     "dx_diag_node.h",
@@ skipping 20 matching lines @@
     "gpu_performance_stats.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",
   ]
 
+  defines = [ "GPU_IMPLEMENTATION" ]
+
   deps = [
     "//base",
     "//third_party/re2",
     "//ui/gl",
   ]
 
   if (is_win) {
     deps += [ "//third_party/libxml" ]
     libs = [ "dxguid.lib", "setupapi.lib" ]
 
@@ skipping 14 matching lines @@
       "//third_party/libXNVCtrl",
     ]
   } else {
     sources -= [ "gpu_info_collector_x11.cc" ]
   }
   if (!use_ozone) {
     sources -= [ "gpu_info_collector_ozone.cc" ]
   }
 }