Removed suppression for bug 243963.

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 2f6f8145127b62d34e6f58f68a00d1511b249d6f..a771a4851183415b7f8786a31577090918be1eba 100644
--- a/tools/valgrind/tsan/suppressions.txt
+++ b/tools/valgrind/tsan/suppressions.txt
@@ -1157,26 +1157,3 @@
   fun:base::MessageLoop::MessageLoop
   fun:remoting::AutoThread::ThreadMain
 }
-{
-  bug_243963
-  ThreadSanitizer:Race
-  fun:base::subtle::RefCountedBase::AddRef
-  fun:base::RefCounted::AddRef
-  fun:scoped_refptr::scoped_refptr
-  fun:base::internal::InvokeHelper::MakeItSo
-  fun:base::internal::Invoker::Run
-  fun:base::Callback::Run
-  fun:base::MessageLoop::RunTask
-  fun:base::MessageLoop::DeferOrRunPendingTask
-  fun:base::MessageLoop::DoWork
-  fun:base::MessagePumpLibevent::Run
-  fun:base::MessageLoop::RunInternal
-  fun:base::MessageLoop::RunHandler
-  fun:base::RunLoop::Run
-  fun:base::MessageLoop::Run
-  fun:base::Thread::Run
-  fun:content::BrowserThreadImpl::FileThreadRun
-  fun:content::BrowserThreadImpl::Run
-  fun:base::Thread::ThreadMain
-  fun:base::::ThreadFunc
-}