GN: Replace Windows suppressions of warning 4267 with config.

webrtc/test/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
@@ skipping 270 matching lines @@
     "testsupport/frame_reader_unittest.cc",
     "testsupport/frame_writer_unittest.cc",
     "testsupport/packet_reader_unittest.cc",
     "testsupport/perf_test_unittest.cc",
     "testsupport/unittest_utils.h",
   ]
 
   configs += [ "..:common_config" ]
   public_configs = [ "..:common_inherited_config" ]
 
+  # TODO(jschuh): Bug 1348: fix this warning.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   if (is_win) {
-    cflags = [
-      # TODO(jschuh): Bug 1348: fix this warning.
-      "/wd4267",  # size_t to int truncations
-      "/wd4373",  # virtual override w/different const/volatile signature.
-    ]
+    cflags = [ "/wd4373" ]  # virtual override w/different const/volatile signature.
   }
 
   if (is_clang) {
     # Suppress warnings from the Chromium Clang plugin.
     # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
     configs -= [ "//build/config/clang:find_bad_constructs" ]
   }
 
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_support" ]
@@ skipping 160 matching lines @@
     configs -= [ "//build/config/clang:find_bad_constructs" ]
   }
 
   deps = [
     ":test_support",
     ":video_test_common",
     "../modules/media_file",
     "//testing/gtest",
   ]
 }