Introduce a new API to handle native notification clicks

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/notifications/notification_builder_mac.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 96 matching lines @@
   DCHECK(profileId.length);
   [notificationData_ setObject:profileId
                         forKey:notification_constants::kNotificationProfileId];
 }
 
 - (void)setIncognito:(BOOL)incognito {
   [notificationData_ setObject:[NSNumber numberWithBool:incognito]
                         forKey:notification_constants::kNotificationIncognito];
 }
 
+- (void)setNotificationType:(NSNumber*)notificationType {
+  [notificationData_ setObject:notificationType
+                        forKey:notification_constants::kNotificationType];
+}
+
 - (NSUserNotification*)buildUserNotification {
   base::scoped_nsobject<NSUserNotification> toast(
       [[NSUserNotification alloc] init]);
   [toast setTitle:[notificationData_ objectForKey:kNotificationTitle]];
   [toast setSubtitle:[notificationData_ objectForKey:kNotificationSubTitle]];
   [toast setInformativeText:[notificationData_
                                 objectForKey:kNotificationInformativeText]];
 
   // Icon
   if ([notificationData_ objectForKey:kNotificationImage]) {
@@ skipping 71 matching lines @@
 
   DCHECK([notificationData_
       objectForKey:notification_constants::kNotificationProfileId]);
   NSString* profileId = [notificationData_
       objectForKey:notification_constants::kNotificationProfileId];
 
   DCHECK([notificationData_
       objectForKey:notification_constants::kNotificationIncognito]);
   NSNumber* incognito = [notificationData_
       objectForKey:notification_constants::kNotificationIncognito];
+  NSNumber* type = [notificationData_
+      objectForKey:notification_constants::kNotificationType];
 
   toast.get().userInfo = @{
     notification_constants::kNotificationOrigin : origin,
     notification_constants::kNotificationId : notificationId,
     notification_constants::kNotificationProfileId : profileId,
     notification_constants::kNotificationIncognito : incognito,
+    notification_constants::kNotificationType : type,
   };
 
   return toast.autorelease();
 }
 
 - (NSDictionary*)buildDictionary {
   return [[notificationData_ copy] autorelease];
 }
 
 @end