Use the new ICU plural syntax to fix the strings in the hung pages dialog.

ui/base/l10n/l10n_util_mac.h

Index: ui/base/l10n/l10n_util_mac.h
diff --git a/ui/base/l10n/l10n_util_mac.h b/ui/base/l10n/l10n_util_mac.h
index 74bc58b49351d381ead9fd6cac35b74773e54808..c1ef16389fda333b579a7494f7251c78796f1c83 100644
--- a/ui/base/l10n/l10n_util_mac.h
+++ b/ui/base/l10n/l10n_util_mac.h
@@ -72,6 +72,12 @@ UI_BASE_EXPORT NSString* GetNSStringFWithFixup(int message_id,
                                                const base::string16& c,
                                                const base::string16& d);
 
+// Get a resource string using |number| with a locale-specific plural rule.
+// |message_id| points to a message in the ICU syntax.
+// See http://userguide.icu-project.org/formatparse/messages and
+// go/plurals (Google internal).
+UI_BASE_EXPORT NSString* GetPluralNSStringF(int message_id, int number);
+
 // Support the override of the locale with the value from Cocoa.
 UI_BASE_EXPORT void OverrideLocaleWithCocoaLocale();
 UI_BASE_EXPORT const std::string& GetLocaleOverride();