Update existing uses of /wd4267 to use the GN config

third_party/libjingle/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/crypto.gni")
 import("//build/config/features.gni")
 
 # From third_party/libjingle/libjingle.gyp's target_defaults.
 config("jingle_unexported_configs") {
   defines = [
@@ skipping 238 matching lines @@
     "$xmpp_dir/xmppstanzaparser.cc",
     "$xmpp_dir/xmppstanzaparser.h",
     "$xmpp_dir/xmpptask.cc",
     "$xmpp_dir/xmpptask.h",
   ]
   sources -= [
     # Compiled as part of libjingle_p2p_constants.
     "$p2p_dir/base/constants.cc",
     "$p2p_dir/base/constants.h",
   ]
+
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   public_deps = [
     ":jingle_deps",
   ]
   deps = [
     "//third_party/webrtc/base:rtc_base",
     ":libjingle_p2p_constants",
   ]
 
   # From libjingle_common.gypi's conditions list.
   if (is_win) {
-    cflags = [
-      "/wd4005",
-      "/wd4267",
-    ]
+    cflags = [ "/wd4005" ]
   }
 
   configs += [ ":jingle_unexported_configs" ]
   public_configs = [ ":jingle_direct_dependent_configs" ]
   all_dependent_configs = [ ":jingle_all_dependent_configs" ]
 }
 
 # This has to be is a separate project due to a bug in MSVS 2008 and the
 # current toolset on android.  The problem is that we have two files named
 # "constants.cc" and MSVS/android doesn't handle this properly.
@@ skipping 284 matching lines @@
       "source/talk/app/webrtc/java/src/org/webrtc/StatsReport.java",
       "source/talk/app/webrtc/java/src/org/webrtc/SessionDescription.java",
       "source/talk/app/webrtc/java/src/org/webrtc/VideoCapturer.java",
       "source/talk/app/webrtc/java/src/org/webrtc/VideoRenderer.java",
       "source/talk/app/webrtc/java/src/org/webrtc/VideoSource.java",
       "source/talk/app/webrtc/java/src/org/webrtc/VideoTrack.java",
     ]
   }
 }  # enable_webrtc
 # TODO(GYP): Port libjingle.gyp's enable_webrtc condition block.