Widen some Valgrind suppressions.

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 # running overnight and removing outdated bugs/suppressions.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 1031 matching lines @@
 }
 {
    # See http://crbug.com/11139
    bug_11139
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN14ProcessWatcher23EnsureProcessTerminatedEi
 }
 {
    # very common in ui tests
-   bug_16089
+   bug_16089a
    Memcheck:Leak
-   fun:*
-   fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
+   ...
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
    ...
    fun:_ZN3net12HostResolver3Job5StartEv
 }
 {
    # ditto, but tweaked to fire on bots, more robust against optimizer changes?
    bug_16089b
    Memcheck:Leak
    fun:_Znw*
-   fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
    ...
    fun:_ZN18chrome_browser_net9DnsMaster24PreLockedScheduleLookupsEv
 }
 {
    # ditto, but tweaked for cat hit by URLFetcherTest.SameThreadsTest on bot
    bug_16089c
    Memcheck:Leak
    ...
-   fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
    ...
    fun:_ZN3net13TCPConnectJob13DoResolveHostEv
 }
 {
    # ditto, but tweak to match the chromeos's stack.
    bug_16089d
    Memcheck:Leak
    fun:*
    ...
-   fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
    ...
    fun:_ZN3net16HostResolverImpl3Job5StartEv
 }
 {
    # ditto, but for IPv6 support (?)
    bug_16089e
    Memcheck:Leak
    fun:*
    ...
-   fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
    ...
    fun:_ZN3net16HostResolverImpl16ProbeIPv6SupportEv
 }
 {
    # ditto, but for filesystem: URLs.
    bug_16089f
    Memcheck:Leak
    ...
-   fun:_ZN4base22PosixDynamicThreadPool8PostTaskEP4Task
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
    ...
    fun:_ZN7fileapi23FileSystemURLRequestJob11ReadRawDataEPN3net8IOBufferEiPi
 }
 {
+   # ditto, but for fileapi::FileWriter
+   bug_16089g
+   Memcheck:Leak
+   ...
+   fun:_ZN4base22PosixDynamicThreadPool8PostTask*
+   ...
+   fun:_ZN7fileapi18FileWriterDelegate5WriteEv
+}
+{
    # very common in ui tests
    bug_16091
    Memcheck:Leak
    ...
    fun:_ZN11MessageLoop22AddDestructionObserverEPNS_19DestructionObserverE
    ...
    fun:_ZN3IPC11SyncChannel11SyncContext15OnChannelOpenedEv
 }
 {
    # very common in ui tests
@@ skipping 3637 matching lines @@
    fun:_ZN7WebCore16HTMLMediaElement19selectMediaResourceEv
    fun:_ZN7WebCore16HTMLMediaElement12loadInternalEv
    fun:_ZN7WebCore16HTMLMediaElement14loadTimerFiredEPNS_5TimerIS0_EE
    fun:_ZN7WebCore5TimerINS_16HTMLMediaElementEE5firedEv
 }
 {
    bug_100608
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN27SQLitePersistentCookieStore7Backend21LoadCookiesForDomainsERKSt3setISsSt4lessISsESaISsEE
-   ...
-   fun:_ZN4base8internal8Invoker*
-   fun:_ZNK4base8CallbackIFvvEE3RunEv
-   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
 }
 {
    bug_100647
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN18WebResourceService19UpdateResourceCacheERKSs
    fun:_ZN18WebResourceService18WebResourceFetcher18OnURLFetchCompleteEPK10URLFetcherRK4GURLRKN3net16URLRequestStatusEiRKSt6vectorISsSaISsEERKSs
    fun:_ZN10URLFetcher8Delegate18OnURLFetchCompleteEPKS_
    fun:_ZN10URLFetcher4Core29InformDelegateFetchIsCompleteEv
    fun:_ZN10URLFetcher4Core21OnCompletedURLRequestEN4base9TimeDeltaE
@@ skipping 501 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }