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

webrtc/modules/utility/BUILD.gn

Index: webrtc/modules/utility/BUILD.gn
diff --git a/webrtc/modules/utility/BUILD.gn b/webrtc/modules/utility/BUILD.gn
index 4d177760bd9c58d8b05eba2069ff88733eacb883..c472c3ec6ac66e219d551a66c11112c262032228 100644
--- a/webrtc/modules/utility/BUILD.gn
+++ b/webrtc/modules/utility/BUILD.gn
@@ -28,9 +28,8 @@ rtc_static_library("utility") {
     "source/process_thread_impl.h",
   ]
 
-  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" ]
   }