Revert 107928 - Pile of nits for tracked object enablement

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 # running overnight and removing outdated bugs/suppressions.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 175 matching lines @@
    fun:*basic_string*
    fun:disk_cache::Stats::Init
 }
 {
    Intentional LeakyLazyInstanceTraits leaks
    Heapcheck:Leak
    ...
    fun:base::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*
-}
-
-
 #-----------------------------------------------------------------------
 # 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 # running overnight and removing outdated bugs/suppressions.
 {
    bug_31643
    Heapcheck:Leak
    fun:browser_sync::BookmarkModelWorker::CallDoWorkFromModelSafeThreadAndWait
    fun:Syncer::SyncShare
@@ skipping 1424 matching lines @@
    fun:base::Callback::Run
    fun:MessageLoop::RunTask
 }
 {
    bug_102256
    Heapcheck:Leak
    ...
    fun:AutocompleteHistoryManager::SendSuggestions
    fun:AutocompleteHistoryManagerTest_ExternalDelegate_Test::TestBody
 }