Suppress race error in disk_cache::BackendImpl

tools/valgrind/tsan/suppressions_mac.txt

 # There are two kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. Intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 224 matching lines @@
   fun:MIO::DAL::System::TeardownShell
   fun:MIO::DAL::System::AtExitHandler
   fun:MIO::DAL::AtExit::AtExitHandler
 }
 {
   bug_100772d
   ThreadSanitizer:Race
   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
+}
+