Implement getting notifications up to the browser process.

content/browser/notifications/notification_message_filter.cc

Index: content/browser/notifications/notification_message_filter.cc
diff --git a/content/browser/notifications/notification_message_filter.cc b/content/browser/notifications/notification_message_filter.cc
index 9d2976ba8e6006fee2a574818d62056c7f29f076..4bd01a36cea2c3921468d61a14df2031112bc890 100644
--- a/content/browser/notifications/notification_message_filter.cc
+++ b/content/browser/notifications/notification_message_filter.cc
@@ -40,6 +40,8 @@ bool NotificationMessageFilter::OnMessageReceived(const IPC::Message& message) {
                         OnShowPlatformNotification)
     IPC_MESSAGE_HANDLER(PlatformNotificationHostMsg_ShowPersistent,
                         OnShowPersistentNotification)
+    IPC_MESSAGE_HANDLER(PlatformNotificationHostMsg_GetNotifications,
+                        OnGetNotifications)
     IPC_MESSAGE_HANDLER(PlatformNotificationHostMsg_Close,
                         OnClosePlatformNotification)
     IPC_MESSAGE_HANDLER(PlatformNotificationHostMsg_ClosePersistent,
@@ -119,6 +121,21 @@ void NotificationMessageFilter::OnShowPersistentNotification(
                                          icon, notification_data);
 }
 
+void NotificationMessageFilter::OnGetNotifications(
+    int request_id,
+    int64_t service_worker_registration_id,
+    const GURL& origin,
+    const std::string& filter_tag) {
+  // TODO(peter): Implement retrieval of persistent Web Notifications from the
+  // database. Reply with an empty vector until this has been implemented.
+  // Tracked in https://crbug.com/442143.
+  NOTIMPLEMENTED();

[johnme, 2015/03/18 15:03:06]

Depending on the NOTIMPLEMENTED_POLICY, this might fail at compile or runtime
when trying to run
LayoutTests/http/tests/notifications/serviceworkerregistration-get-empty.html?
Perhaps just put a DLOG here?

[Peter Beverloo, 2015/03/19 15:46:44]

Good point. I removed the notice entirely, since I'm probably the only one who
cares anyway.

+
+  Send(new PlatformNotificationMsg_DidGetNotifications(
+      request_id,
+      std::vector<PersistentNotificationInfo>()));
+}
+
 void NotificationMessageFilter::OnClosePlatformNotification(
     int notification_id) {
   if (!close_closures_.count(notification_id))