Retrive displayed notifications asynchronously

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 f708a0bd47c32a8e8c116a12a92cf636e17bcc11..59fb6f413a5f1682b13508bbeb67602b2c2fe1e9 100644
--- a/chrome/browser/notifications/notification_platform_bridge_mac.mm
+++ b/chrome/browser/notifications/notification_platform_bridge_mac.mm
@@ -120,6 +120,14 @@ void DoProcessNotificationResponse(NotificationCommon::Operation operation,
 // Close all notifications.
 - (void)closeAllNotifications;
 
+//  Get displayed alerts for |profileId| merge them with |localNotifications|
+// and post |callback| to the IO thread.
+- (void)
+getDisplayedAlertsForProfileId:(NSString*)profileId
+        withLocalNotifications:(NSArray*)localNotifications
+                      callback:(NotificationCommon::NotificationResultCallback)
+                                   callback;
+
 @end
 
 // /////////////////////////////////////////////////////////////////////////////
@@ -289,9 +297,24 @@ bool NotificationPlatformBridgeMac::GetDisplayed(
           objectForKey:notification_constants::kNotificationId]));
     }
   }
+
   return true;
 }
 
+void NotificationPlatformBridgeMac::GetDisplayedAsync(
+    const std::string& profile_id,
+    bool incognito,
+    const NotificationCommon::NotificationResultCallback& callback) const {
+#if BUILDFLAG(ENABLE_XPC_NOTIFICATIONS)
+  [alert_dispatcher_
+      getDisplayedAlertsForProfileId:base::SysUTF8ToNSString(profile_id)
+              withLocalNotifications:[notification_center_
+                                         deliveredNotifications]
+                            callback:callback];
+
+#endif  // ENABLE_XPC_NOTIFICATIONS
+}
+
 // static
 void NotificationPlatformBridgeMac::ProcessNotificationResponse(
     NSDictionary* response) {
@@ -476,6 +499,38 @@ bool NotificationPlatformBridgeMac::VerifyNotificationData(
   [[xpcConnection_ remoteObjectProxy] closeAllNotifications];
 }
 
+- (void)
+getDisplayedAlertsForProfileId:(NSString*)profileId
+        withLocalNotifications:(NSArray*)localNotifications
+                      callback:(NotificationCommon::NotificationResultCallback)
+                                   callback {
+  auto reply = ^(NSArray* alerts) {
+    std::unique_ptr<std::set<std::string>> displayedNotifications =
+        base::MakeUnique<std::set<std::string>>();
+
+    for (NSUserNotification* toast in localNotifications) {
+      NSString* toastProfileId = [toast.userInfo
+          objectForKey:notification_constants::kNotificationProfileId];
+      if ([toastProfileId isEqualToString:profileId]) {
+        displayedNotifications->insert(base::SysNSStringToUTF8([toast.userInfo
+            objectForKey:notification_constants::kNotificationId]));
+      }
+    }
+
+    for (NSString* alert in alerts) {
+      displayedNotifications->insert(base::SysNSStringToUTF8(alert));
+    }
+
+    content::BrowserThread::PostTask(
+        content::BrowserThread::IO, FROM_HERE,
+        base::Bind(callback, base::Passed(&displayedNotifications),
+                   true /* supports sync */));
+  };
+
+  [[xpcConnection_ remoteObjectProxy] getDisplayedAlertsForProfileId:profileId
+                                                           withReply:reply];
+}
+
 // NotificationReply implementation
 - (void)notificationClick:(NSDictionary*)notificationResponseData {
   NotificationPlatformBridgeMac::ProcessNotificationResponse(