Suppress a leak in invalidation::NewPermanentCallback (issue 88438)

BUG=88438
TBR=akalin
Review URL: http://codereview.chromium.org/7307010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91500 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1543,4 +1543,11 @@
    fun:TestingProfile::CreateRequestContext
    fun:ProfileSyncService*Test::SetUp
 }
-
+{
+   bug_88438
+   Heapcheck:Leak
+   fun:invalidation::NewPermanentCallback
+   fun:invalidation::InvalidationClientImpl::ScheduleStartAfterReadingStateBlob
+   fun:invalidation::InvalidationClientImpl::Start
+   fun:sync_notifier::ChromeInvalidationClient::Start
+}