TSan: Remove suppressions for DiskCacheBackendTest::BackendTrimInvalidEntry2

tools/valgrind/tsan/suppressions.txt

 # There are a few 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 # running overnight and removing outdated bugs/suppressions.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 327 matching lines @@
    bug_100026
    ThreadSanitizer:Race
    ...
    fun:std::ostream::operator*
    ...
    fun:logging::LogMessage::*LogMessage
    fun:base::PlatformThread::SetThreadPriority
    fun:base::SimpleThread::SetThreadPriority
    fun:AudioRendererImpl::Run
 }
-{
-  Intentional race in net_unittest
-  ThreadSanitizer:Race
-  fun:disk_cache::BackendImpl::GetEntryCount
-  fun:DiskCacheBackendTest::BackendTrimInvalidEntry2
-  fun:DiskCacheBackendTest_TrimInvalidEntry2_Test::TestBody
-  fun:testing::internal::HandleSehExceptionsInMethodIfSupported
-}
 
 ############################
 # 2.2 Benign races in Chromium
 {
   bug_61179 [benign race on tracked_objects::Births]
   ThreadSanitizer:Race
   fun:tracked_objects::Births::*Birth*
 }
 
 {
@@ skipping 228 matching lines @@
 }
 {
   bug_100020
   ThreadSanitizer:Race
   fun:linked_ptr_internal::join
   fun:linked_ptr::copy
   ...
   fun:HostContentSettingsMap::GetDefaultContentSetting
 }
 {
-   bug_101853_a
-   ThreadSanitizer:Race
-   fun:disk_cache::Rankings::IncrementCounter
-   fun:disk_cache::Rankings::Insert
-   fun:disk_cache::Eviction::OnDoomEntryV2
-   ...
-   fun:disk_cache::BackendImpl::MatchEntry
-   fun:disk_cache::BackendImpl::InternalDoomEntry
-}
-{
-   bug_101853_b
-   ThreadSanitizer:Race
-   fun:disk_cache::BackendImpl::DecreaseNumEntries
-   fun:disk_cache::BackendImpl::RemoveEntry
-   fun:disk_cache::EntryImpl::DeleteEntryData
-   fun:disk_cache::EntryImpl::~EntryImpl
-}
-{
-   bug_101853_c
-   ThreadSanitizer:Race
-   fun:disk_cache::BackendImpl::DecreaseNumEntries
-   fun:disk_cache::BackendImpl::DestroyInvalidEntry
-   fun:disk_cache::BackendImpl::MatchEntry
-   fun:disk_cache::BackendImpl::InternalDoomEntry
-}
-{
-  bug_101853_d
-  ThreadSanitizer:Race
-  fun:disk_cache::BackendImpl::GetEntryCount
-  fun:DiskCacheBackendTest::BackendTrimInvalidEntry2
-  fun:DiskCacheBackendTest_*
-}
-{
   bug_102134a
   ThreadSanitizer:Race
   fun:content::BrowserThreadImpl::~BrowserThreadImpl
   fun:content::TestBrowserThread::~TestBrowserThread
 }
 {
   bug_102134b
   ThreadSanitizer:Race
   fun:BrowserThread::~BrowserThread
   fun:DeprecatedBrowserThread::~DeprecatedBrowserThread
 }
 {
   bug_102327_a
   ThreadSanitizer:Race
   fun:tracked_objects::ThreadData::Initialize
   fun:tracked_objects::ThreadData::InitializeThreadContext
   fun:base::Thread::ThreadMain
   fun:base::::ThreadFunc
 }
 {
   bug_102327_b
   ThreadSanitizer:Race
   ...
   fun:tracked_objects::ThreadData::TallyABirthIfActive
   fun:base::PosixDynamicThreadPool::PendingTask::PendingTask
   fun:base::PosixDynamicThreadPool::WaitForTask
   fun:base::::WorkerThread::ThreadMain
   fun:base::::ThreadFunc
 }