Allow revocation checking to be disabled on Mac, overriding/ignoring system settings

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 # running overnight and removing outdated bugs/suppressions.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 173 matching lines @@
    # Capturer on Mac uses OpenGL driver, which triggers several warnings.
    # The check has to be quite generic, as different hardware graphics cards
    # will cause different sets of warnings.
    bug_75037
    Memcheck:Cond
    ...
    fun:gl*
    ...
    fun:_ZN8remoting*CapturerMac*
 }
+{
+   # See also http://openradar.appspot.com/radar?id=1169404
+   bug_79533
+   Memcheck:Value4
+   ...
+   fun:_ZN8Security13MappingHandleIlE4findINS_6CursorEEERT_li
+   fun:_ZN8Security13AppleDatabase14dataAbortQueryERNS_9DbContextEl
+   fun:_ZN8Security15DatabaseSession14DataAbortQueryEll
+   fun:_ZL19cssm_DataAbortQuery17cssm_dl_db_handlel
+   fun:CSSM_DL_DataAbortQuery
+   fun:_ZN11SSDLSession14DataAbortQueryEll
+   fun:_ZL19cssm_DataAbortQuery17cssm_dl_db_handlel
+   fun:CSSM_DL_DataAbortQuery
+   fun:tpDbFindIssuerCrl
+   fun:tpVerifyCertGroupWithCrls
+}
 
 # 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.
 {
    # Plugins are deliberately not unloaded (on shutdown) on the Mac, in order to
    # prevent crashes for those that don't unload cleanly.
    plugin_unload
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base17LoadNativeLibraryERK8FilePath
@@ skipping 761 matching lines @@
    fun:_ZN36SignatureVerifierTest_BasicTest_Test8TestBodyEv
 }
 
 {
    bug_51682b
    Memcheck:Leak
    fun:malloc
    fun:__cxa_get_globals
    fun:__cxa_allocate_exception
    fun:_ZN8Security9CssmError7throwMeEi
-   fun:_ZNK8Security9DbVersion9findTableEj
-   fun:_ZNK8Security9DbVersion12createCursorEPK10cssm_query
-   fun:_ZN8Security10DbModifier12createCursorEPK10cssm_query
-   fun:_ZN8Security13AppleDatabase12dataGetFirstERNS_9DbContextEPKNS_9CssmQueryEP29cssm_db_record_attribute_dataPNS_8CssmDataERP21cssm_db_unique_record
-   fun:_ZN8Security15DatabaseSession12DataGetFirstElPKNS_9CssmQueryEP29cssm_db_record_attribute_dataPNS_8CssmDataERP21cssm_db_unique_record
-   fun:_ZL17cssm_DataGetFirst17cssm_dl_db_handlePK10cssm_queryPlP29cssm_db_record_attribute_dataP9cssm_dataPP21cssm_db_unique_record
-   fun:CSSM_DL_DataGetFirst
+   ...
+   fun:SecTrustEvaluate
 }
 {
    bug_51682c
    Memcheck:Leak
    fun:realloc
    fun:_ZN16DefaultAllocator7reallocEPvm
    fun:_ZN8Security28CssmAllocatorMemoryFunctions12relayReallocEPvmS1_
    fun:_ZNK8Security19CssmMemoryFunctions7reallocEPvm
    fun:_ZN8Security28CssmMemoryFunctionsAllocator7reallocEPvm
    fun:_ZN10Attachment13upcallReallocElPvj
@@ skipping 569 matching lines @@
    fun:+[NSNavFBENode copyStandardSidebarNodes]
    fun:-[NSNavSidebarController load]
    fun:-[NSNavView loadSidebar]
    fun:-[NSSavePanel _initSidebarAndPopups]
    fun:-[NSSavePanel _initPanelCommon]
    fun:-[NSSavePanel initWithContentRect:styleMask:backing:defer:]
    fun:+[NSSavePanel _crunchyRawUnbonedPanel]
    fun:_ZN20SelectFileDialogImpl10SelectFileEN16SelectFileDialog4TypeERKSbItN4base20string16_char_traitsESaItEERK8FilePathPKNS0_12FileTypeInfoEiRKSsP8NSWindowPv
    fun:_ZN15DownloadManager24OnPathExistenceAvailableEP18DownloadCreateInfo
 }