Update existing uses of /wd4267 to use the GN config

google_apis/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/features.gni")
 import("//testing/test.gni")
 
 declare_args() {
   # You can set the variable 'use_official_google_api_keys' to true
   # to use the Google-internal file containing official API keys
@@ skipping 104 matching lines @@
     "gaia/oauth2_token_service_request.cc",
     "gaia/oauth2_token_service_request.h",
     "gaia/oauth_request_signer.cc",
     "gaia/oauth_request_signer.h",
     "gaia/ubertoken_fetcher.cc",
     "gaia/ubertoken_fetcher.h",
     "google_api_keys.cc",
     "google_api_keys.h",
   ]
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int
-  }
-
-  configs += [ ":key_defines" ]
+  configs += [
+    ":key_defines",
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//crypto",
     "//net",
     "//third_party/libxml",
   ]
 
   if (enable_extensions) {
@@ skipping 91 matching lines @@
         "drive/drive_api_parser_unittest.cc",
         "drive/drive_api_requests_unittest.cc",
         "drive/drive_api_url_generator_unittest.cc",
         "drive/request_sender_unittest.cc",
         "drive/request_util_unittest.cc",
         "drive/time_util_unittest.cc",
       ]
     }
   }
 }