Retrive displayed notifications asynchronously

chrome/browser/notifications/notification_platform_bridge.h

Index: chrome/browser/notifications/notification_platform_bridge.h
diff --git a/chrome/browser/notifications/notification_platform_bridge.h b/chrome/browser/notifications/notification_platform_bridge.h
index 720245c8c8eb12465b5ab9d6d5ed949b4daa636f..0724c2858b3a0f573d7c1bc7401e37279b375e68 100644
--- a/chrome/browser/notifications/notification_platform_bridge.h
+++ b/chrome/browser/notifications/notification_platform_bridge.h
@@ -44,6 +44,13 @@ class NotificationPlatformBridge {
                             bool incognito,
                             std::set<std::string>* notification_ids) const = 0;
 
+  // Asynchronous version of |GetDisplayed|
+  // TODO(miguelg): remove the sync version once all paths have been updated.
+  virtual void GetDisplayedAsync(
+      const std::string& profile_id,
+      bool incognito,
+      const NotificationCommon::NotificationResultCallback& callback) const = 0;
+
  protected:
   NotificationPlatformBridge() {}