Revise the stack signature for bug 22923....

tools/valgrind/memcheck/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 # running overnight and removing outdated bugs/suppressions.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 1263 matching lines @@
    bug_22702
    Memcheck:Cond
    fun:_ZN7WebCore23V8AbstractEventListener18invokeEventHandlerEN2v86HandleINS1_7ContextEEEPNS_5EventENS2_INS1_5ValueEEEb
    fun:_ZN7WebCore23V8AbstractEventListener11handleEventEPNS_5EventEb
 }
 {
    bug_22923
    Memcheck:Leak
    fun:_Znwj
    ...
-   fun:_ZN17WorkerProcessHost4InitEv
    fun:_ZN13WorkerService21CreateDedicatedWorkerERK4GURLiiPN3IPC7Message6SenderEii
    fun:_ZN21ResourceMessageFilter23OnCreateDedicatedWorkerERK4GURLiPi
    fun:_Z16DispatchToMethodI21ResourceMessageFilterMS0_FvRK4GURLiPiES1_iiEvPT_T0_RK6Tuple2IT1_T2_EP6Tuple1IT3_E
    fun:_ZN3IPC16MessageWithReplyI6Tuple2I4GURLiE6Tuple1IRiEE8DispatchI21ResourceMessageFilterMS9_FvRKS2_iPiEEEbPKNS_7MessageEPT_T0_
    fun:_ZN21ResourceMessageFilter17OnMessageReceivedERKN3IPC7MessageE
    fun:_ZN3IPC12ChannelProxy7Context10TryFiltersERKNS_7MessageE
    fun:_ZN3IPC11SyncChannel11SyncContext17OnMessageReceivedERKNS_7MessageE
    fun:_ZN3IPC7Channel11ChannelImpl23ProcessIncomingMessagesEv
    fun:_ZN3IPC7Channel11ChannelImpl28OnFileCanReadWithoutBlockingEi
    fun:_ZN4base19MessagePumpLibevent22OnLibeventNotificationEisPv
    fun:event_process_active
    fun:event_base_loop
    fun:_ZN4base19MessagePumpLibevent3RunEPNS_11MessagePump8DelegateE
    fun:_ZN11MessageLoop11RunInternalEv
    fun:_ZN11MessageLoop10RunHandlerEv
    fun:_ZN11MessageLoop3RunEv
    fun:_ZN4base6Thread3RunEP11MessageLoop
    fun:_ZN4base6Thread10ThreadMainEv
    fun:_Z10ThreadFuncPv
    fun:start_thread
    fun:clone
 }