Add one more mac suppression found with a local run and slightly different co...

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 # running overnight and removing outdated bugs/suppressions.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 735 matching lines @@
 }
 {
    bug_21286
    Memcheck:Leak
    fun:_Znw*
    fun:sendSimpleEventToSelf
    fun:aeInitializeFromHIToolbox
    fun:INIT_AppleEvents
 }
 {
-  bug_21479
-  Memcheck:Leak
-  fun:malloc_zone_malloc
-  fun:_CFRuntimeCreateInstance
-  fun:CFPasteboardCreate
-  fun:CFPasteboardCreateUnique
-  fun:+[NSPasteboard _pasteboardWithName:]
-  fun:+[NSPasteboard pasteboardWithUniqueName]
+   bug_21479
+   Memcheck:Leak
+   fun:malloc_zone_malloc
+   fun:_CFRuntimeCreateInstance
+   fun:CFPasteboardCreate
+   fun:CFPasteboardCreateUnique
+   fun:+[NSPasteboard _pasteboardWithName:]
+   fun:+[NSPasteboard pasteboardWithUniqueName]
 }
+{
+   bug_21645a
+   Memcheck:Cond
+   fun:_ZN3gfx4Size9set_widthEi
+   fun:_ZN3gfx4Rect9set_widthEi
+   fun:_ZN3gfx4RectC2ERK6CGRect
+   fun:_ZN3gfx4RectC1ERK6CGRect
+   fun:_ZNK12_GLOBAL__N_126DefaultMonitorInfoProvider25GetPrimaryMonitorWorkAreaEv
+   fun:_ZNK11WindowSizer22GetDefaultWindowBoundsEPN3gfx4RectE
+   fun:_ZNK11WindowSizer21DetermineWindowBoundsERKN3gfx4RectEPS1_Pb
+   fun:_ZN11WindowSizer22GetBrowserWindowBoundsERKSbIwSt11char_traitsIwESaIwEERKN3gfx4RectEP7BrowserPS7_Pb
+   fun:_ZNK7Browser20GetSavedWindowBoundsEv
+   fun:-[BrowserWindowController initWithBrowser:takeOwnership:]
+   fun:-[BrowserWindowController initWithBrowser:]
+}
+{
+   bug_21645b
+   Memcheck:Cond
+   fun:NSMouseInRect
+   fun:-[NSThemeFrame _updateWidgets]
+   fun:-[NSThemeFrame _tileTitlebarAndRedisplay:]
+   ...
+   fun:-[NSWindowController window]
+   fun:-[BrowserWindowController initWithBrowser:takeOwnership:]
+   fun:-[BrowserWindowController initWithBrowser:]
+}