Add one more 'boring' caller and widen one Mac suppression

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, 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.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 190 matching lines @@
    fun:_ZN15TMountPointList20SupportsInvisibleBitEsPN5TNode12StPopulatingEb
    fun:_ZNK21THFSPlusPropertyStore4OpenEbb
    fun:_ZNK21THFSPlusPropertyStore13GetPropertiesEb
    fun:_ZN16TFSCopyOperation22GetSourcePropertyStoreERK11THFSPlusRef
    fun:_ZN16TFSCopyOperation13DoMoveToTrashERK11THFSPlusRef
    fun:_ZN16TFSCopyOperation3RunEv
    fun:_FSOperation
    fun:_FSOperateOnObjectSync
    fun:FSMoveObjectToTrashSync
    fun:_Z9TrashFuncRK8FilePath
-   fun:_Z18DispatchToFunctionIPFvRK8FilePathES0_EvT_RK6Tuple1IT0_E
-   fun:_ZN16RunnableFunctionIPFvRK8FilePathE6Tuple1IS0_EE3RunEv
 }
 {
    # See also http://openradar.appspot.com/radar?id=1169404
    bug_79533a
    Memcheck:Value4
    ...
    fun:_Z*19cssm_DataAbortQuery17cssm_dl_db_handlel
    fun:CSSM_DL_DataAbortQuery
    fun:_ZN11SSDLSession14DataAbortQueryEll
    fun:_Z*19cssm_DataAbortQuery17cssm_dl_db_handlel
@@ skipping 1722 matching lines @@
    fun:_ZN15tracked_objects10ThreadData23InitializeThreadContextERKSs
 }
 {
    bug_102621
    Memcheck:Cond
    fun:NSHFSTypeCodeFromFileType
    fun:-[NSPasteboard(ChimeraPasteboardURLUtils) getURLs:andTitles:convertingFilenames:]
    fun:_ZN2ui33PopulateURLAndTitleFromPasteboardEP4GURLPSbItN4base20string16_char_traitsESaItEEP12NSPasteboarda
    fun:_ZN24WebDragDestTest_URL_Test8TestBodyEv
 }