Relax the character limits before resorting to eTLD+1

chrome/browser/notifications/notification_platform_bridge_mac.mm

Index: chrome/browser/notifications/notification_platform_bridge_mac.mm
diff --git a/chrome/browser/notifications/notification_platform_bridge_mac.mm b/chrome/browser/notifications/notification_platform_bridge_mac.mm
index 0cf42092190e69cab13c60048e17494499f52bf8..89f88188c811efbb386b2d33042e7d55b29f6846 100644
--- a/chrome/browser/notifications/notification_platform_bridge_mac.mm
+++ b/chrome/browser/notifications/notification_platform_bridge_mac.mm
@@ -147,11 +147,8 @@ base::string16 CreateNotificationContext(const Notification& notification,
   // These numbers have been obtained through experimentation on various
   // Mac OS platforms.
 
-  // Corresponds to the string "mmmmmmmmmmmmmm"
-  constexpr size_t kMaxDomainLenghtAlert = 14;
-
-  // Corresponds to the string "mmmmmmmmmmmmmmmmmmmmm"
-  constexpr size_t kMaxDomainLenghtBanner = 21;
+  constexpr size_t kMaxDomainLenghtAlert = 19;
+  constexpr size_t kMaxDomainLenghtBanner = 28;
 
   size_t max_characters = IsPersistentNotification(notification)
                               ? kMaxDomainLenghtAlert