Suppress memory leak from WebKit (MAC)

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 # running overnight and removing outdated bugs/suppressions.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 2143 matching lines @@
 }
 {
    bug_105580
    Memcheck:Leak
    fun:malloc_zone_malloc
    fun:malloc_set_zone_name
    fun:malloc_default_purgeable_zone
    fun:_ZN4base30EnableTerminationOnOutOfMemoryEv
    fun:_ZN7leveldb12_GLOBAL__N_111ChromiumEnvC2Ev
    fun:_ZN4base25DefaultLazyInstanceTraitsIN7leveldb12_GLOBAL__N_111ChromiumEnvEE3NewEPv
-   fun:_ZN4base12LazyInstanceIN7leveldb12_GLOBAL__N_111ChromiumEnvENS_23LeakyLazyInstanceTraitsIS3_EEE7PointerEv
+   fun:_ZN4base12LazyInstanceIN7leveldb12_GLOBAL__N_111ChromiumEnvENS_*
    fun:_ZN7leveldb7OptionsC2Ev
    fun:_ZN7fileapi27FileSystemDirectoryDatabase4InitEv
    fun:_ZN7fileapi27FileSystemDirectoryDatabase11GetFileInfoExPNS0_8FileInfoE
    fun:_ZN7fileapi59FileSystemDirectoryDatabaseTest_TestMissingFileGetInfo_Test8TestBodyEv
 }
 {
    bug_105938_a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7WebCore23v8StringToWebCoreStringIN3WTF12AtomicStringEEET_N2v86HandleINS4_6StringEEENS_12ExternalModeE
@@ skipping 154 matching lines @@
 {
    bug_102920
    Memcheck:Unaddressable
    fun:MDItemCreate
    fun:CSBackupSetItemExcluded
    fun:_ZN4base3mac22SetFileBackupExclusionERK8FilePath
    fun:_ZN7history17ThumbnailDatabase4InitERK8FilePathPKNS_16HistoryPublisherEPNS_11URLDatabaseE
    fun:_ZN7history14HistoryBackend8InitImplERKSs
    fun:_ZN7history14HistoryBackend4InitERKSsb
 }