Annotate the intentional test-only leak in base/tracked_objects.cc.

tools/heapcheck/suppressions.txt

 # There are three 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 # running overnight and removing outdated bugs/suppressions.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 332 matching lines @@
    fun:disk_cache::Stats::Init
 }
 {
    Intentional LeakyLazyInstanceTraits leaks
    Heapcheck:Leak
    ...
    fun:base::internal::LeakyLazyInstanceTraits::New
    fun:base::LazyInstance::Pointer
 }
 {
-   Intentional leak in object tracking statics to avoid shutdown race
-   Heapcheck:Leak
-   ...
-   fun:tracked_objects::ThreadData::Initialize*
-}
-{
-   Intentional leak in object tracking of thread context to avoid shutdown race
-   Heapcheck:Leak
-   fun:tracked_objects::ThreadData::Get
-}
-{
-   Intentional leak of task birth and death data to avoid shutdown race
-   Heapcheck:Leak
-   ...
-   fun:tracked_objects::ThreadData::TallyA*
-}
-{
    NSS is initialized (LeakyLazyInstance) but intentionally never shut down
    Heapcheck:Leak
    ...
    fun:InitSessionCacheLocks
    fun:initSessionCacheLocksLazily
    ...
    fun:ssl_InitSessionCacheLocks
 }
 {
    FileStream::Context can leak through WorkerPool by design (Linux)
@@ skipping 967 matching lines @@
    fun:gfx::RenderText::IndexOfAdjacentGrapheme
    fun:gfx::RenderTextTest_GraphemePositions_Test::TestBody
 }
 {
    bug_134717
    Heapcheck:Leak
    fun:ui::InputMethodIBus::CreateContext
    fun:ui::InputMethodIBus::Init
 }
 {
-   bug_136936_a
-   Heapcheck:Leak
-   ...
-   fun:std::basic_string::_Rep::_S_create
-   ...
-   fun:base::PlatformThread::SetName
-}
-{
-   bug_136936_b
-   Heapcheck:Leak
-   ...
-   fun:std::basic_string::_Rep::_S_create
-   ...
-   fun:base::PlatformThread::CurrentId
-}
-{
    bug_143565
    Heapcheck:Leak
    ...
    fun:appcache::AppCacheStorageImpl::Initialize
    fun:appcache::AppCacheService::Initialize
    fun:ChromeAppCacheService::InitializeOnIOThread
 }
 {
    bug_144913
    Heapcheck:Leak
@@ skipping 584 matching lines @@
    fun:ExtensionWebRequestEventRouter::OnEventHandled
    fun:EventHandledOnIOThread
 }
 {
    bug_246825e
    Heapcheck:Leak
    fun:sqlite3MemMalloc
    ...
    fun:extensions::ActivityDatabase::Init
 }