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

webrtc/p2p/BUILD.gn

Index: webrtc/p2p/BUILD.gn
diff --git a/webrtc/p2p/BUILD.gn b/webrtc/p2p/BUILD.gn
index 30146170538ce3e3ec937c168fc91f0266a26b6f..1b352f47bf8b0e598c75d9f0fdb068da19bad68f 100644
--- a/webrtc/p2p/BUILD.gn
+++ b/webrtc/p2p/BUILD.gn
@@ -112,9 +112,8 @@ rtc_static_library("rtc_p2p") {
       "FEATURE_ENABLE_PSTN",
     ]
 
-    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" ]
     }
   }