Update existing uses of /wd4267 to use the GN config

net/third_party/nss/ssl/BUILD.gn

Index: net/third_party/nss/ssl/BUILD.gn
diff --git a/net/third_party/nss/ssl/BUILD.gn b/net/third_party/nss/ssl/BUILD.gn
index 002bace8d6167efdd8d97b809b4d029e457c3655..d6035d517bbf738537ac59aad2a8dd0cbe4d9be0 100644
--- a/net/third_party/nss/ssl/BUILD.gn
+++ b/net/third_party/nss/ssl/BUILD.gn
@@ -67,11 +67,12 @@ component("libssl") {
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+    "//build/config/compiler:no_size_t_to_int_warning",

[Dirk Pranke, 2015/02/18 21:29:29]

no_size_t is already disabled in no_chromium_code, so I think this one is
unneeded.

+  ]
 
   if (is_win) {
-    cflags += [ "/wd4267" ]  # Disable warning: Conversion from size_t to 'type'.
-
     sources -= [
       "unix_err.c",
       "unix_err.h",