Add more size_t -> int warning fixes for the win x64 GN build.

media/audio/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/linux/pkg_config.gni")
 import("//media/media_options.gni")
 
 # When libpulse is not directly linked, use stubs to allow for dlopening of the
 # binary.
 if (!link_pulseaudio) {
@@ skipping 268 matching lines @@
     "fake_audio_consumer_unittest.cc",
     "simple_sources_unittest.cc",
     "virtual_audio_input_stream_unittest.cc",
     "virtual_audio_output_stream_unittest.cc",
   ]
   deps = [
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
-  configs += [ "//media:media_config" ]
+
+  configs += [
+    "//build/config/compiler:no_size_t_to_int_warning",
+    "//media:media_config",
+  ]
 
   if (is_android) {
     sources += [ "android/audio_android_unittest.cc" ]
   } else {
     sources += [ "audio_input_volume_unittest.cc" ]
   }
 
   if (is_mac) {
     sources += [
       "mac/audio_auhal_mac_unittest.cc",
@@ skipping 29 matching lines @@
     ]
   }
 
   if (use_alsa) {
     sources += [
       "alsa/alsa_output_unittest.cc",
       "audio_low_latency_input_output_unittest.cc",
     ]
   }
 }