new file mode 100644
--- /dev/null
+++ b/media/webrtc/trunk/gtest/FakeNsTraceRefcnt.cpp
@@ -0,0 +1,10 @@
+
+#define MOZ_DUMP_ASSERTION_STACK
+#include <mozilla/Assertions.h>
+
+#include <stdio.h>
+
+void
+nsTraceRefcnt::WalkTheStack(FILE* aStream)
+{
+}

--- a/media/webrtc/trunk/gtest/moz.build
+++ b/media/webrtc/trunk/gtest/moz.build
@@ -372,16 +372,17 @@ if CONFIG['OS_TARGET'] in ['Darwin', 'Li
         '../webrtc/voice_engine/channel_unittest.cc',
         '../webrtc/voice_engine/network_predictor_unittest.cc',
         '../webrtc/voice_engine/transmit_mixer_unittest.cc',
         '../webrtc/voice_engine/utility_unittest.cc',
         '../webrtc/voice_engine/voe_audio_processing_unittest.cc',
     # Fails VoEBaseTest.GetVersion!
     #    '../webrtc/voice_engine/voe_base_unittest.cc',
         'FakeIPC.cpp',
+        'FakeNsTraceRefcnt.cpp',
     ]
 
     # Unable to use unified build due to multiply defined symbols
     SOURCES += [
         '../webrtc/audio/audio_send_stream_unittest.cc',
         '../webrtc/audio/audio_state_unittest.cc',
         '../webrtc/modules/audio_processing/beamformer/nonlinear_beamformer_unittest.cc',
         '../webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc',