Introduce a new API to handle native notification clicks

chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm

Index: chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm
diff --git a/chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm b/chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm
index cf4df014184f8df80027d21ff31fe51e698472df..6e1bda37b641fe3d0d482409625ece5b8c6675ed 100644
--- a/chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm
+++ b/chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.mm
@@ -10,7 +10,7 @@
 namespace {
 
 // Make sure this Obj-C enum is kept in sync with the
-// PlatformNotificationServiceImpl NotificationOperation enum.
+// notification_operation_common::NotificationOperation enum.
 // The latter cannot be reused because the XPC service is not aware of
 // PlatformNotificationCenter.
 enum NotificationOperation {
@@ -43,6 +43,8 @@ enum NotificationOperation {
       objectForKey:notification_constants::kNotificationIncognito]);
   NSNumber* incognito = [[notification userInfo]
       objectForKey:notification_constants::kNotificationIncognito];
+  NSNumber* notificationType = [[notification userInfo]
+      objectForKey:notification_constants::kNotificationType];
 
   // Initialize operation and button index for the case where the
   // notification itself was clicked.
@@ -88,8 +90,9 @@ enum NotificationOperation {
     notification_constants::kNotificationId : notificationId,
     notification_constants::kNotificationProfileId : profileId,
     notification_constants::kNotificationIncognito : incognito,
-    notification_constants::kNotificationOperation :
-        [NSNumber numberWithInt:operation],
+    notification_constants::kNotificationType : notificationType,
+    notification_constants::
+    kNotificationOperation : [NSNumber numberWithInt:operation],
     notification_constants::
     kNotificationButtonIndex : [NSNumber numberWithInt:buttonIndex],
   };