GN: Exclude suppressions of Chromium Clang warnings for Chromium builds.

webrtc/modules/media_file/BUILD.gn

Index: webrtc/modules/media_file/BUILD.gn
diff --git a/webrtc/modules/media_file/BUILD.gn b/webrtc/modules/media_file/BUILD.gn
index f73c44bcacff09157f13dc250acbbd40c8d3ec43..37e966ddc2ca81883d2c95bd1778df979b72ad0a 100644
--- a/webrtc/modules/media_file/BUILD.gn
+++ b/webrtc/modules/media_file/BUILD.gn
@@ -27,9 +27,8 @@ rtc_static_library("media_file") {
   # TODO(jschuh): Bug 1348: fix this warning.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
-  if (is_clang) {
-    # Suppress warnings from Chrome's Clang plugins.
-    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+  if (!build_with_chromium && is_clang) {
+    # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
     suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
   }