Update Valgrind suppressions

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 # running overnight and removing outdated bugs/suppressions.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 1817 matching lines @@
    Memcheck:Addr1
    fun:IOCFUnserializeparse
    fun:IOCFUnserialize
    fun:IORegistryEntryCreateCFProperties
    fun:_ZN15CVCGDisplayLink17setCurrentDisplayEj
    fun:_ZN15CVCGDisplayLink18initWithCGDisplaysEPjlPi
    fun:CVDisplayLinkCreateWithCGDisplays
    fun:CVDisplayLinkCreateWithActiveCGDisplays
    fun:-[AcceleratedPluginView initWithRenderWidgetHostViewMac:pluginHandle:]
 }
+{
+   bug_93036
+   Memcheck:Addr2
+   fun:+[NSPICTImageRep _verifyDataIsPICT:]
+   fun:+[NSImageRep imageRepClassForData:]
+   fun:-[NSImage initWithData:]
+   fun:_ZN2ui14ResourceBundle19GetNativeImageNamedEi
+   fun:-[BookmarkBarController initWithBrowser:initialWidth:delegate:resizeDelegate:]
+}
+{
+   bug_93038
+   Memcheck:Cond
+   fun:-[AvatarMenuBubbleController performLayout]
+   ...
+   fun:*AvatarMenuBubbleControllerTest*
+}