TSAN bot failure in base::StatisticsRecorder::FindHistogram

Adds suppression for TSAN bot failure in base::StatisticsRecorder::FindHistogram

BUG=104776
TEST=tsan bots go green
TBR=jar@chromium.org

Review URL: http://codereview.chromium.org/8597014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110738 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/tsan/suppressions.txt

@@ -692,3 +692,11 @@
    fun:MessageLoop::RunHandler
    fun:MessageLoop::Run
 }
+{
+   bug_104776
+   ThreadSanitizer:Race
+   fun:base::StatisticsRecorder::FindHistogram
+   fun:base::LinearHistogram::FactoryGet
+   fun:dbus::ObjectProxy::RunResponseCallback
+   fun:base::internal::Invoker4::DoInvoke
+}