Introduce a //content/ API for dispatching notificationclick events.

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index 7f6f74900370982846209114b62bd8df8375995f..c41e7777187355b97895f55ab7ad7dc11ac58cc6 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -39,6 +39,7 @@ class ServiceWorkerContextCore;
 class ServiceWorkerProviderHost;
 class ServiceWorkerRegistration;
 class ServiceWorkerVersionInfo;
+struct ShowDesktopNotificationHostMsgParams;
 
 // This class corresponds to a specific version of a ServiceWorker
 // script for a given pattern. When a script is upgraded, there may be
@@ -204,8 +205,10 @@ class CONTENT_EXPORT ServiceWorkerVersion
   // from the worker to notify completion.
   //
   // This must be called when the status() is ACTIVATED.
-  void DispatchNotificationClickEvent(const StatusCallback& callback,
-                                      const std::string& notification_id);
+  void DispatchNotificationClickEvent(
+      const StatusCallback& callback,
+      const std::string& notification_id,
+      const ShowDesktopNotificationHostMsgParams& notification_data);
 
   // Sends push event to the associated embedded worker and asynchronously calls
   // |callback| when it errors out or it gets a response from the worker to