Increase Web Notification timeout to 20 seconds

chrome/browser/notifications/platform_notification_service_impl.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/prefs/pref_service.h"
@@ skipping 369 matching lines @@
         l10n_util::GetStringUTF16(IDS_NOTIFICATION_SETTINGS));
     settings_button.icon =
         ui::ResourceBundle::GetSharedInstance().GetImageNamed(
             IDR_NOTIFICATION_SETTINGS);
     buttons.push_back(settings_button);
   }
 #endif  // !defined(OS_ANDROID)
 
   notification.set_buttons(buttons);
 
+  notification.set_is_web_notification(true);
+
   // On desktop, notifications with require_interaction==true stay on-screen
   // rather than minimizing to the notification center after a timeout.
   // On mobile, this is ignored (notifications are minimized at all times).
   if (notification_data.require_interaction)
     notification.set_never_timeout(true);
 
   return notification;
 }
 
 NotificationUIManager*
@@ skipping 36 matching lines @@
         extensions::ExtensionRegistry::Get(profile)->GetExtensionById(
             origin.host(), extensions::ExtensionRegistry::EVERYTHING);
     DCHECK(extension);
 
     return base::UTF8ToUTF16(extension->name());
   }
 #endif
 
   return base::string16();
 }