Suppress race error in disk_cache::BackendImpl

tools/valgrind/tsan/suppressions_mac.txt

Index: tools/valgrind/tsan/suppressions_mac.txt
diff --git a/tools/valgrind/tsan/suppressions_mac.txt b/tools/valgrind/tsan/suppressions_mac.txt
index 3fff46d4e03c4a7b2640d2c137a9303c1c6edeb3..8937cb6f84c373b81541991618254a1428e868bc 100644
--- a/tools/valgrind/tsan/suppressions_mac.txt
+++ b/tools/valgrind/tsan/suppressions_mac.txt
@@ -242,3 +242,30 @@
   fun:DVSignalSync
   fun:DVDeviceTerminate
 }
+{
+   bug_101853_a
+   ThreadSanitizer:Race
+   fun:disk_cache::Rankings::IncrementCounter
+   fun:disk_cache::Rankings::Insert
+   fun:disk_cache::Eviction::OnDoomEntryV2
+   fun:disk_cache::BackendImpl::DestroyInvalidEntry
+   fun:disk_cache::BackendImpl::MatchEntry
+   fun:disk_cache::BackendImpl::InternalDoomEntry
+}
+{
+   bug_101853_b
+   ThreadSanitizer:Race
+   fun:disk_cache::BackendImpl::DecreaseNumEntries
+   fun:disk_cache::BackendImpl::DestroyInvalidEntry
+   fun:disk_cache::BackendImpl::MatchEntry
+   fun:disk_cache::BackendImpl::InternalDoomEntry
+}
+{
+   bug_101853_c
+   ThreadSanitizer:Race
+   fun:disk_cache::BackendImpl::DecreaseNumEntries
+   fun:disk_cache::BackendImpl::RemoveEntry
+   fun:disk_cache::EntryImpl::DeleteEntryData
+   fun:disk_cache::EntryImpl::~EntryImpl
+}
+