Limit the window of time a promo can be visible after first view.

chrome/browser/web_resource/notification_promo.h

 // Copyright (c) 2012 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_WEB_RESOURCE_NOTIFICATION_PROMO_H_
 #define CHROME_BROWSER_WEB_RESOURCE_NOTIFICATION_PROMO_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 78 matching lines @@
   void WritePrefs();
 
   // Tests group_ against max_group_.
   // When max_group_ is 0, all groups pass.
   bool ExceedsMaxGroup() const;
 
   // Tests views_ against max_views_.
   // When max_views_ is 0, we don't cap the number of views.
   bool ExceedsMaxViews() const;
 
+  // Tests |first_view_time_| + |max_seconds_| and -now().
+  // When either is 0, we don't cap the number of seconds.
+  bool ExceedsMaxSeconds() const;
+
   // Returns false if this promo should not be displayed because it is a promo
   // for the app launcher, and the user has already enabled the app launcher.
   bool CheckAppLauncher() const;
 
   PrefService* prefs_;
 
   PromoType promo_type_;
   std::string promo_text_;
 
   scoped_ptr<const base::DictionaryValue> promo_payload_;
 
   double start_;
   double end_;
 
   int num_groups_;
   int initial_segment_;
   int increment_;
   int time_slice_;
   int max_group_;
 
   // When max_views_ is 0, we don't cap the number of views.
   int max_views_;
 
+  // When max_seconds_ is 0 or not set, we don't cap the number of seconds a
+  // promo can be visible.
+  int max_seconds_;
+
+  // Set when the promo is viewed for the first time.
+  double first_view_time_;
+
   int group_;
   int views_;
   bool closed_;
 
   bool new_notification_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationPromo);
 };
 
 #endif  // CHROME_BROWSER_WEB_RESOURCE_NOTIFICATION_PROMO_H_