Widen RuleSet::ensurePendingRules leak suppression

BUG=340957
TBR=abarth@chromium.org

Review URL: https://codereview.chromium.org/163703002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250998 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -2382,7 +2382,8 @@
    fun:_ZN7WebCore7RuleSet7addRule*
    fun:_ZN7WebCore7RuleSet13addChildRules*
    fun:_ZN7WebCore7RuleSet17addRulesFromSheet*
-   fun:_ZN7WebCore21CSSDefaultStyleSheets16loadDefaultStyleEv
-   fun:_ZN7WebCore21CSSDefaultStyleSheets32loadDefaultStylesheetIfNecessaryEv
+   fun:_ZN7WebCore21CSSDefaultStyleSheets*
+   fun:_ZN7WebCore21CSSDefaultStyleSheets*
+   ...
    fun:_ZN7WebCore13StyleResolver*
 }