suppress memory leak from MetricsLog::MetricsLog

TBR=szym@chromium.org
BUG=176048
TEST=waterfall.sh

Review URL: https://codereview.chromium.org/12254014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182275 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1785,3 +1785,12 @@
    fun:OAuth2RevocationFetcherTest_RequestFailure_Test::OAuth2RevocationFetcherTest_RequestFailure_Test
    fun:testing::internal::TestFactoryImpl::CreateTest
 }
+{
+   bug_176048
+   Heapcheck:Leak
+   ...
+   fun:MetricsNetworkObserver::ProbeWifiPHYLayerProtocol
+   fun:MetricsNetworkObserver::MetricsNetworkObserver
+   fun:MetricsLog::MetricsLog
+   fun:TestMetricsLog
+}

tools/valgrind/memcheck/suppressions.txt

@@ -6538,3 +6538,14 @@
     ...
     fun:_ZN6WebKit20WebLayerTreeViewImpl*
 }
+{
+   bug_176048
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
+   fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
+   fun:_ZN22MetricsNetworkObserver25ProbeWifiPHYLayerProtocolEv
+   fun:_ZN22MetricsNetworkObserverC1Ev
+   fun:_ZN10MetricsLogC2ERKSsi
+   fun:_ZN12_GLOBAL__N_114TestMetricsLogC1ERKSsi
+}