Service Worker: Migrate to version_uuid and surface ServiceWorker.id. (Chromium 2/3)

content/child/service_worker/web_service_worker_impl.cc

Index: content/child/service_worker/web_service_worker_impl.cc
diff --git a/content/child/service_worker/web_service_worker_impl.cc b/content/child/service_worker/web_service_worker_impl.cc
index 0939aaa7b6d83c6056b8f34151179307418ace4c..c0564b0157bb1939d4bdc86dbcb83bdb3012f6fa 100644
--- a/content/child/service_worker/web_service_worker_impl.cc
+++ b/content/child/service_worker/web_service_worker_impl.cc
@@ -63,6 +63,10 @@ blink::WebServiceWorkerState WebServiceWorkerImpl::state() const {
   return state_;
 }
 
+blink::WebString WebServiceWorkerImpl::id() const {
+  return blink::WebString::fromUTF8(handle_ref_->id());
+}
+
 void WebServiceWorkerImpl::postMessage(const WebString& message,
                                        WebMessagePortChannelArray* channels) {
   thread_safe_sender_->Send(new ServiceWorkerHostMsg_PostMessageToWorker(