Add an elided frame to suppress one more leak in CookiesWindowController.

BUG=69757
TEST=Mac Valgrind goes green
TBR=thestig

Review URL: http://codereview.chromium.org/6297005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71559 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -1292,6 +1292,7 @@
    fun:_ZNSt8_Rb_treeISsSt4pairIKSsPN3net22HttpAuthHandlerFactoryEESt10_Select1stIS5_ESt4lessISsESaIS5_EE11_M_get_nodeEv
    fun:_ZNSt8_Rb_treeISsSt4pairIKSsPN3net22HttpAuthHandlerFactoryEESt10_Select1stIS5_ESt4lessISsESaIS5_EE14_M_create_nodeERKS5_
    fun:_ZNSt8_Rb_treeISsSt4pairIKSsPN3net22HttpAuthHandlerFactoryEESt10_Select1stIS5_ESt4lessISsESaIS5_EE9_M_insertEPSt18_Rb_tree_node_baseSD_RKS5_
+   ...
    fun:_ZNSt8_Rb_treeISsSt4pairIKSsPN3net22HttpAuthHandlerFactoryEESt10_Select1stIS5_ESt4lessISsESaIS5_EE13insert_uniqueESt17_Rb_tree_iteratorIS5_ERKS5_
    fun:_ZNSt3mapISsPN3net22HttpAuthHandlerFactoryESt4lessISsESaISt4pairIKSsS2_EEE6insertESt17_Rb_tree_iteratorIS7_ERKS7_
    fun:_ZNSt3mapISsPN3net22HttpAuthHandlerFactoryESt4lessISsESaISt4pairIKSsS2_EEEixERS6_