[Mac] Add XPC alerts to GetDisplayedNotifications

chrome/browser/ui/cocoa/notifications/alert_notification_service.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/alert_notification_service.h"
 
 #import "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/notifications/notification_builder_mac.h"
 #include "chrome/browser/ui/cocoa/notifications/notification_constants_mac.h"
 #import "chrome/browser/ui/cocoa/notifications/xpc_transaction_handler.h"
@@ skipping 41 matching lines @@
     }
   }
 }
 
 - (void)closeAllNotifications {
   [[NSUserNotificationCenter defaultUserNotificationCenter]
       removeAllDeliveredNotifications];
   [transactionHandler_ closeTransactionIfNeeded];
 }
 
+- (void)getDisplayedAlertIds:(NSString*)profileId
+                   withReply:(void (^)(NSArray*))reply {
+  NSUserNotificationCenter* notificationCenter =
+      [NSUserNotificationCenter defaultUserNotificationCenter];
+  NSMutableArray* notificationIds = [NSMutableArray
+      arrayWithCapacity:[[notificationCenter deliveredNotifications] count]];
+  for (NSUserNotification* toast in
+       [notificationCenter deliveredNotifications]) {
+    NSString* candidateProfileId = [toast.userInfo
+        objectForKey:notification_constants::kNotificationProfileId];
+    if ([candidateProfileId isEqualToString:profileId]) {
+      [notificationIds
+          addObject:[toast.userInfo
+                        objectForKey:notification_constants::kNotificationId]];
+    }
+  }
+  reply(notificationIds);
+}
+
 @end