Make GetDisplayedNotifications asynchronous.

chrome/browser/notifications/notification_platform_bridge_android.h

Index: chrome/browser/notifications/notification_platform_bridge_android.h
diff --git a/chrome/browser/notifications/notification_platform_bridge_android.h b/chrome/browser/notifications/notification_platform_bridge_android.h
index 301338deb0aac23e44f09d31f81aff8e6c1ba547..a73ab4e2474de84e0557349b2545ff07d7346406 100644
--- a/chrome/browser/notifications/notification_platform_bridge_android.h
+++ b/chrome/browser/notifications/notification_platform_bridge_android.h
@@ -69,9 +69,10 @@ class NotificationPlatformBridgeAndroid : public NotificationPlatformBridge {
                const Notification& notification) override;
   void Close(const std::string& profile_id,
              const std::string& notification_id) override;
-  bool GetDisplayed(const std::string& profile_id,
+

[Peter Beverloo, 2017/03/15 18:07:50]

nit: drop the blank line (comment on line 64 applies)

[Miguel Garcia, 2017/03/16 14:57:42]

Done.

+  void GetDisplayed(const std::string& profile_id,
                     bool incognito,
-                    std::set<std::string>* notifications) const override;
+                    const NotificationResultCallback& callback) const override;
 
   static bool RegisterNotificationPlatformBridge(JNIEnv* env);