Fix another race condition on worker process shutdown that results in use-aft...

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 28613)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -966,24 +966,6 @@
    fun:_ZN7WebCore5Frame4initEv
 }
 {
-   bug_23018_a
-   Memcheck:Addr4
-   fun:_ZN12_GLOBAL__N_115KillProcessTask3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
-   fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
-   fun:_ZN11MessageLoop13DoDelayedWorkEPN4base4TimeE
-}
-{
-   # This is the same callstack as above, but for whatever reason the signature
-   # of the top line, KillProcessTask::Run(), is displayed differently.
-   bug_23018_b
-   Memcheck:Addr4
-   fun:_ZN122_GLOBAL__N__b_slave_chromium_rel_linux_valgrind_builder_build_src_chrome_worker_webworkerclient_proxy.cc_00000000_BBD84F3C15KillProcessTask3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
-   fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
-   fun:_ZN11MessageLoop13DoDelayedWorkEPN4base4TimeE
-}
-{
    bug_23151
    Memcheck:Addr4
    ...
@@ -1105,19 +1087,3 @@
    fun:_ZN11MessageLoop11RunInternalEv
    fun:_ZN11MessageLoop10RunHandlerEv
 }
-{
-   bug_24346
-   Memcheck:Addr4
-   fun:_ZN13WebWorkerImpl25ReportPendingActivityTaskEPN7WebCore22ScriptExecutionContextEPS_b
-   fun:_ZN7WebCore18GenericWorkerTask2IP13WebWorkerImplS2_bbE11performTaskEPNS_22ScriptExecutionContextE
-   fun:_ZN13WebWorkerImpl16InvokeTaskMethodEPv
-   fun:_ZN3WTF31dispatchFunctionsFromMainThreadEv
-   fun:_Z18DispatchToFunctionIPFvvEEvT_RK6Tuple0
-   fun:_ZN16RunnableFunctionIPFvvE6Tuple0E3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
-   fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
-   fun:_ZN11MessageLoop6DoWorkEv
-   fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
-   fun:_ZN11MessageLoop11RunInternalEv
-   fun:_ZN11MessageLoop10RunHandlerEv
-}