A speculative fix for TSAN and HeapCheck failures in InMemoryURLIndexCacheTest.

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 84079259cff083ab123e181f020982ae600f47a7..c1b686c9158ba1d55ab5cdc34273ae530a280a3d 100644
--- a/tools/valgrind/tsan/suppressions.txt
+++ b/tools/valgrind/tsan/suppressions.txt
@@ -989,24 +989,3 @@
   fun:media::MockMediaSource::AppendAtTime
   fun:media::PipelineIntegrationTest_MediaSource_ConfigChange_WebM_Test::TestBody
 }
-{
-  bug_146322_a
-  ThreadSanitizer:Race
-  ...
-  fun:sql::Connection::StatementRefCreated
-  fun:sql::Connection::StatementRef::StatementRef
-  fun:sql::Connection::GetUniqueStatement
-  ...
-  fun:history::*
-}
-{
-  bug_146322_b
-  ThreadSanitizer:Race
-  ...
-  fun:sql::Connection::StatementRefDeleted
-  fun:sql::Connection::StatementRef::~StatementRef
-  fun:base::RefCounted::Release
-  fun:scoped_refptr::~scoped_refptr
-  fun:sql::Statement::~Statement
-  fun:history::InMemoryURLIndexTest::SetUp
-}