Suppress Uninitialized Read on AudioOutputProxyTest_TwoStreams_BothPlaying_Mixer_Test

TBR=enal@chromium.org
BUG=125728
TEST=waterfall.sh

Review URL: https://chromiumcodereview.appspot.com/10271031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134703 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -2417,3 +2417,12 @@
    fun:_ZN8remoting8protocol21AuthenticatorTestBase14RunChannelAuthEb
    fun:_ZN8remoting8protocol52NegotiatingAuthenticatorTest_SuccessfulAuthHmac_Test8TestBodyEv
 }
+{
+   bug_125728
+   Memcheck:Uninitialized
+   fun:_ZN5mediaL12AddSaturatedIiLin32768ELi32767EEEiii
+   fun:_ZN5mediaL10MixStreamsIsiLin32768ELi32767ELi0EEEvPT_S2_if
+   fun:_ZN5media10MixStreamsEPvS0_mif
+   fun:_ZN5media16AudioOutputMixer10OnMoreDataEPhjNS_17AudioBuffersStateE
+   fun:_ZN5media54AudioOutputProxyTest_TwoStreams_BothPlaying_Mixer_Test8TestBodyEv
+}