Remove suppression of race:browser_sync::PasswordChangeProcessor::Disconnect.

tools/valgrind/tsan/suppressions.txt

Index: tools/valgrind/tsan/suppressions.txt
diff --git a/tools/valgrind/tsan/suppressions.txt b/tools/valgrind/tsan/suppressions.txt
index 224231995e00cc1339ac682017aeff3345d9f3d9..ac055d51ccddd29de8419e91c4a5d778eb38d55e 100644
--- a/tools/valgrind/tsan/suppressions.txt
+++ b/tools/valgrind/tsan/suppressions.txt
@@ -1124,17 +1124,3 @@
   fun:content::::FakeAudioThread::ThreadMain
   fun:base::::ThreadFunc
 }
-{
-  bug_297194
-  ThreadSanitizer:Race
-  fun:scoped_refptr::operator=
-  fun:browser_sync::PasswordChangeProcessor::Disconnect
-  fun:browser_sync::PasswordDataTypeController::DisconnectProcessor
-  fun:browser_sync::NonFrontendDataTypeController::BackendComponentsContainer::Disconnect
-  fun:browser_sync::NonFrontendDataTypeController::Stop
-  fun:browser_sync::ModelAssociationManager::Stop
-  fun:browser_sync::DataTypeManagerImpl::StopImpl
-  fun:browser_sync::DataTypeManagerImpl::Stop
-  fun:ProfileSyncService::ShutdownImpl
-  fun:ProfileSyncService::Shutdown
-}