Remove suppression for bug 22031....

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 # running overnight and removing outdated bugs/suppressions.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 898 matching lines @@
 }
 {
    bug_22021
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF10fastMallocE*
    ...
    fun:_ZN7WebCore19V8EventListenerList3addEPNS_15V8EventListenerE
 }
 {
-   bug_22031
-   Memcheck:Param
-   write(buf)
-   ...
-   fun:_ZN3net10FileStream5WriteEPKciP14CallbackRunnerI6Tuple1IiEE
-   fun:_ZN14SessionBackend20AppendCommandsToFileEPN3net10FileStreamERKSt6vectorIP14SessionCommandSaIS5_EE
-}
-{
    bug_22098
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base19MessagePumpLibevent19WatchFileDescriptorEibNS0_4ModeEPNS0_21FileDescriptorWatcherEPNS0_7WatcherE
    fun:_ZN16MessageLoopForIO19WatchFileDescriptorEibNS_4ModeEPN4base19MessagePumpLibevent21FileDescriptorWatcherEPNS2_7WatcherE
    fun:_ZN3IPC7Channel11ChannelImpl23ProcessOutgoingMessagesEv
    fun:_ZN3IPC7Channel11ChannelImpl4SendEPNS_7MessageE
    fun:_ZN3IPC7Channel4SendEPNS_7MessageE
    fun:_ZN3IPC12ChannelProxy7Context13OnSendMessageEPNS_7MessageE
    fun:_ZN3IPC8SendTask3RunEv
@@ skipping 238 matching lines @@
    fun:_ZN12RenderThread24OnControlMessageReceivedERKN3IPC7MessageE
    fun:_ZN11ChildThread17OnMessageReceivedERKN3IPC7MessageE
    fun:_ZN3IPC12ChannelProxy7Context17OnDispatchMessageERKNS_7MessageE
    fun:_Z16DispatchToMethodIN3IPC12ChannelProxy7ContextEMS2_FvRKNS0_7MessageEES3_EvPT_T0_RK6Tuple1IT1_E
    fun:_ZN14RunnableMethodIN3IPC12ChannelProxy7ContextEMS2_FvRKNS0_7MessageEE6Tuple1IS3_EE3RunEv
    fun:_ZN11MessageLoop7RunTaskEP4Task
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
 }