Enable tracking of objects by default

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 # running overnight and removing outdated bugs/suppressions.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 # running overnight and removing outdated bugs/suppressions.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
@@ skipping 1419 matching lines @@
 {
    bug_100608
    Heapcheck:Leak
    ...
    fun:SQLitePersistentCookieStore::Backend::LoadCookiesForDomains
    ...
    fun:base::internal::Invoker*::DoInvoke
    fun:base::Callback::Run
    fun:MessageLoop::RunTask
 }