Add support for base::Closure in the MessageLoop.

tools/valgrind/memcheck/suppressions_mac.txt

Index: tools/valgrind/memcheck/suppressions_mac.txt
diff --git a/tools/valgrind/memcheck/suppressions_mac.txt b/tools/valgrind/memcheck/suppressions_mac.txt
index 4c41a30cb15e5fd45a2374d7e57775bad0c75c28..9afb85ee0f79d4d042ea651de9c7f7ea670ac801 100644
--- a/tools/valgrind/memcheck/suppressions_mac.txt
+++ b/tools/valgrind/memcheck/suppressions_mac.txt
@@ -372,7 +372,7 @@
    fun:_ZN3IPC12ChannelProxy7Context17OnDispatchMessageERKNS_7MessageE
    fun:_Z16DispatchToMethodIN3IPC12ChannelProxy7ContextEMS2_FvRKNS0_7MessageEES3_EvPT_T0_RK6Tuple1IT1_E
    fun:_ZN14RunnableMethodIN3IPC12ChannelProxy7ContextEMS2_FvRKNS0_7MessageEE6Tuple1IS3_EE3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
@@ -572,7 +572,7 @@
    fun:_ZN12CrxInstaller15CompleteInstallEv
    fun:_Z16DispatchToMethodI12CrxInstallerMS0_FvvEEvPT_T0_RK6Tuple0
    fun:_ZN14RunnableMethodI12CrxInstallerMS0_FvvE6Tuple0E3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base19MessagePumpLibevent3RunEPNS_11MessagePump8DelegateE
@@ -600,7 +600,7 @@
    fun:_ZN28PCMQueueOutAudioOutputStream5StartEPN17AudioOutputStream19AudioSourceCallbackE
    fun:_ZN5media21AudioOutputController6DoPlayEv
    fun:_ZN14RunnableMethodIN5media21AudioOutputControllerEMS1_FvvE6Tuple0E3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
@@ -792,7 +792,7 @@
    fun:_ZN18UtilityProcessHost12StartProcessERK8FilePath
    fun:_ZN18UtilityProcessHost22StartExtensionUnpackerERK8FilePath
    fun:_ZN14RunnableMethodI26SandboxedExtensionUnpackerMS0_FvRK8FilePathE6Tuple1IS1_EE3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
 }
 {
    bug_52681_b
@@ -805,7 +805,7 @@
    fun:_ZN26SandboxedExtensionUnpacker22StartProcessOnIOThreadERK8FilePath
    fun:_Z16DispatchToMethodI26SandboxedExtensionUnpackerMS0_FvRK8FilePathES1_EvPT_T0_RK6Tuple1IT1_E
    fun:_ZN14RunnableMethodI26SandboxedExtensionUnpackerMS0_FvRK8FilePathE6Tuple1IS1_EE3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
 }
 {
    bug_53742_a
@@ -1166,7 +1166,7 @@
    fun:_ZN14PrefValueStore18RefreshPolicyPrefsEP14CallbackRunnerI6Tuple1ISt6vectorISsSaISsEEEE
    fun:_Z16DispatchToMethodIN18TestingPrefService21TestingPrefValueStoreEM14PrefValueStoreFvP14CallbackRunnerI6Tuple1ISt6vectorISsSaISsEEEEESA_EvPT_T0_RKS4_IT1_E
    fun:_ZN14RunnableMethodIN18TestingPrefService21TestingPrefValueStoreEM14PrefValueStoreFvP14CallbackRunnerI6Tuple1ISt6vectorISsSaISsEEEEES4_ISA_EE3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
@@ -1352,7 +1352,7 @@
    fun:_ZN13ExtensionHost20ProcessCreationQueue14ProcessOneHostEv
    fun:_Z16DispatchToMethodIN13ExtensionHost20ProcessCreationQueueEMS1_FvvEEvPT_T0_RK6Tuple0
    fun:_ZN27ScopedRunnableMethodFactoryIN13ExtensionHost20ProcessCreationQueueEE14RunnableMethodIMS1_FvvE6Tuple0E3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
+   fun:_ZN11MessageLoop7RunTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
    fun:_ZN11MessageLoop6DoWorkEv
    fun:_ZN4base24MessagePumpCFRunLoopBase7RunWorkEv