Display the first item for list mac native notifications

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 291d8bccebd17cb293f0e76dc5caa4cbb80395c3..267873aeeca38273d066568c5335623b5963b64d 100644
--- a/chrome/browser/notifications/notification_platform_bridge_mac.mm
+++ b/chrome/browser/notifications/notification_platform_bridge_mac.mm
@@ -182,7 +182,14 @@ void NotificationPlatformBridgeMac::Display(
 
   [builder
       setTitle:base::SysUTF16ToNSString(CreateNotificationTitle(notification))];
-  [builder setContextMessage:base::SysUTF16ToNSString(notification.message())];
+
+  base::string16 context_message =
+      notification.items().empty()
+          ? notification.message()
+          : (notification.items().at(0).title + base::UTF8ToUTF16(" - ") +
+             notification.items().at(0).message);

[Peter Beverloo, 2017/04/13 14:27:29]

You could improve RTL support by using a simple structure like the following:


base::string16 CreateNotificationMessage(const Notification& notification) {
  if (notification.items().empty())
    return notification.message();

  const message_center::NotificationItem& item = notification.items()[0];
  const base::string16 separator = base::UTF8ToUTF16(" - ");

  if (base::i18n::IsRTL())
    return item.message + separator + item.title;

  return item.title + separator + item.message;
 }

+
+  [builder setContextMessage:base::SysUTF16ToNSString(context_message)];
 
   bool requires_attribution =
       notification.context_message().empty() &&