[Background Sync] Use Mojo IPC to fire background sync events

content/browser/service_worker/service_worker_dispatcher_host.cc

Index: content/browser/service_worker/service_worker_dispatcher_host.cc
diff --git a/content/browser/service_worker/service_worker_dispatcher_host.cc b/content/browser/service_worker/service_worker_dispatcher_host.cc
index fc102749e40f46541e6d97761823605f534649ea..edcdd6f79f6d17a3db703587b01b97097ebe8d21 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host.cc
+++ b/content/browser/service_worker/service_worker_dispatcher_host.cc
@@ -110,6 +110,7 @@ ServiceWorkerDispatcherHost::ServiceWorkerDispatcherHost(
 
 ServiceWorkerDispatcherHost::~ServiceWorkerDispatcherHost() {
   if (GetContext()) {
+    GetContext()->RemoveMojoEventDispatcher(render_process_id_);
     GetContext()->RemoveAllProviderHostsForProcess(render_process_id_);
     GetContext()->embedded_worker_registry()->RemoveChildProcessSender(
         render_process_id_);
@@ -131,6 +132,10 @@ void ServiceWorkerDispatcherHost::Init(
     return;
   GetContext()->embedded_worker_registry()->AddChildProcessSender(
       render_process_id_, this, message_port_message_filter_);
+
+  mojo_event_dispatcher_ =
+      make_scoped_ptr(new ServiceWorkerMojoEventDispatcher(render_process_id_));
+  GetContext()->AddMojoEventDispatcher(mojo_event_dispatcher_.get());
 }
 
 void ServiceWorkerDispatcherHost::OnFilterAdded(IPC::Sender* sender) {