ServiceWorker: Add support for .skipWaiting and controllerchange event(2/3)

content/renderer/service_worker/embedded_worker_context_client.cc

Index: content/renderer/service_worker/embedded_worker_context_client.cc
diff --git a/content/renderer/service_worker/embedded_worker_context_client.cc b/content/renderer/service_worker/embedded_worker_context_client.cc
index 10bfd115d5b23c3cbc6c25580bc8dc03a65144be..7df9361d1fcd3bcd6d44a73e2b6216c593fa8cb1 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.cc
+++ b/content/renderer/service_worker/embedded_worker_context_client.cc
@@ -361,6 +361,12 @@ void EmbeddedWorkerContextClient::postMessageToClient(
                                          make_scoped_ptr(channels));
 }
 
+void EmbeddedWorkerContextClient::skipWaiting(
+    blink::WebServiceWorkerSkipWaitingCallbacks* callbacks) {
+  DCHECK(script_context_);
+  script_context_->SkipWaiting(callbacks);
+}
+
 void EmbeddedWorkerContextClient::OnMessageToWorker(
     int thread_id,
     int embedded_worker_id,