Suppresses the valgrind error for Issue 47949....

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 # running overnight and removing outdated bugs/suppressions.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 1194 matching lines @@
 }
 {
    bug_46797
    Memcheck:Cond
    fun:_ZN39ContentSettingsDialogControllerInternal18PrefObserverBridge7ObserveE16NotificationTypeRK18NotificationSourceRK19NotificationDetails
    ...
    fun:_ZN11PrefService13FireObserversEPKw
    ...
    fun:_ZN12_GLOBAL__N_*ContentSettingsDialogControllerTest_*
 }
+{
+   bug_47949
+   Memcheck:Cond
+   fun:rips_f_DrawRing
+   fun:rips_f_BltShape
+   fun:ripc_Render
+   fun:ripc_DrawRects
+   fun:CGContextFillRects
+   fun:CGContextFillRect
+   fun:NSRectFill
+   fun:_ZN18FocusIndicationFix40currentOSHasSetFocusRingStyleInBitmapBugEv
+}