Suppress leak induced during thread cleanup allocation

We now allocate a map to hold contexts for
worker threads when we are doing tear-down
of the thread. This data structrure is 
intentionally leaked, along with all stats tables
in the profiler.

r=rtenneti
Review URL: http://codereview.chromium.org/8533031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110113 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -5184,6 +5184,12 @@
    fun:_ZN15tracked_objects10ThreadData11TallyABirthERKNS_8LocationE
    fun:_ZN15tracked_objects10ThreadData19TallyABirthIfActiveERKNS_8LocationE
 }
+{
+   Intentional leak of stl map during thread cleanup in profiler
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZNK15tracked_objects10ThreadData26OnThreadTerminationCleanupEv
+}
 {
    bug_102614
    Memcheck:Leak