Leak fix in FileSystemOperationUnitTest.

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 # running overnight and removing outdated bugs/suppressions.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 4616 matching lines @@
    fun:_ZN16P2PSocketHostUdp15DidCompleteReadEi
    ...
    fun:_ZN16P2PSocketHostUdp6OnRecvEi
    fun:_Z16DispatchToMethodI16P2PSocketHostUdpMS0_FviEiEvPT_T0_RK6Tuple1IT1_E
    fun:_ZN12CallbackImplI16P2PSocketHostUdpMS0_FviE6Tuple1IiEE13RunWithParamsERKS4_
    fun:_ZN14CallbackRunnerI6Tuple1IiEE3RunIiEEvRKT_
    fun:_ZN3net17UDPSocketLibevent14DoReadCallbackEi
    fun:_ZN3net17UDPSocketLibevent15DidCompleteReadEv
 }
 {
-   bug_83944_a
-   Memcheck:Leak
-   ...
-   fun:_ZN7fileapi23FileSystemOperationTest5SetUpEv
-}
-{
    bug_83944_b
    Memcheck:Addr1
    fun:bcmp
    fun:_ZNKSs7compareERKSs
    fun:_ZSteqIcSt11char_traitsIcESaIcEEbRKSbIT_T0_T1_ES8_
    fun:_ZNK4GURLeqERKS_
    fun:_ZNSt4listI4GURLSaIS0_EE6removeERKS0_
    fun:_ZN5quota12_GLOBAL__N_124MockQuotaEvictionHandler19EnsureOriginRemovedERK4GURL
    fun:_ZN5quota12_GLOBAL__N_124MockQuotaEvictionHandler15EvictOriginDataERK4GURLNS_11StorageTypeEP14CallbackRunnerI6Tuple1INS_15QuotaStatusCodeEEE
    fun:_ZN5quota28QuotaTemporaryStorageEvictor14OnGotLRUOriginERK4GURL
@@ skipping 36 matching lines @@
 }
 {
    bug_todo_getdelim2
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }