Hide notifications after their deadline

chrome/browser/android/ntp/content_suggestions_notification_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_NTP_CONTENT_SUGGESTIONS_NOTIFICATION_HELPER_H_
 #define CHROME_BROWSER_ANDROID_NTP_CONTENT_SUGGESTIONS_NOTIFICATION_HELPER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
+#include "base/time/time.h"
 #include "url/gurl.h"
 
 namespace gfx {
 class Image;
 }  // namespace gfx
 
 namespace ntp_snippets {
 
 class ContentSuggestionsNotificationHelper {
  public:
   static void OpenURL(const GURL& url);
   static void SendNotification(const GURL& url,
                                const base::string16& title,
                                const base::string16& text,
-                               const gfx::Image& image);
-  static void HideNotification();
+                               const gfx::Image& image,
+                               base::Time timeout_at);
+  static void HideAllNotifications();
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ContentSuggestionsNotificationHelper);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // CHROME_BROWSER_ANDROID_NTP_CONTENT_SUGGESTIONS_NOTIFICATION_HELPER_H_