[Memory Sheriff] Widen FileStream suppression.

tools/valgrind/memcheck/suppressions.txt

 # There are four 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 # running overnight and removing outdated bugs/suppressions.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 7219 matching lines @@
    fun:_ZN3net20MockHostResolverBase11ResolveProcEmRKNS_12HostResolver11RequestInfoEPNS_11AddressListE
    fun:_ZN3net20MockHostResolverBase10ResolveNowEm
 }
 {
    bug_251004_a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
    fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
    fun:_ZN3net10FileStream7Context14CloseAndDeleteEv
-   ...
-   fun:_ZN7fileapi18FileWriterDelegateD0Ev
 }
-{
-   bug_251004_b
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
-   fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
-   fun:_ZN3net10FileStream7Context14CloseAndDeleteEv
-   ...
-   fun:_ZN42LocalFileStreamWriterTest*
-}
-{
-   bug_251004_c
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
-   fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
-   fun:_ZN3net10FileStream7Context14CloseAndDeleteEv
-   ...
-   fun:_ZN11webkit_blob*LocalFileStreamReaderTest*
-}
-{
-   bug_251004_d
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
-   fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
-   fun:_ZN3net10FileStream7Context14CloseAndDeleteEv
-   ...
-   fun:_ZN7fileapi33UploadFileSystemFileElementReaderD0Ev
-}