Service Worker: Add ServiceWorkerContainer.getRegistrations() method.

content/child/service_worker/web_service_worker_provider_impl.cc

Index: content/child/service_worker/web_service_worker_provider_impl.cc
diff --git a/content/child/service_worker/web_service_worker_provider_impl.cc b/content/child/service_worker/web_service_worker_provider_impl.cc
index 96185668c0ec5f38b6cadf53376601a33708e30e..6e27976de6fde06db922f7ee27f85ae249cade0d 100644
--- a/content/child/service_worker/web_service_worker_provider_impl.cc
+++ b/content/child/service_worker/web_service_worker_provider_impl.cc
@@ -71,6 +71,13 @@ void WebServiceWorkerProviderImpl::getRegistration(
       context_->provider_id(), document_url, callbacks);
 }
 
+void WebServiceWorkerProviderImpl::getRegistrations(
+    const blink::WebURL& document_url,
+    WebServiceWorkerGetRegistrationsCallbacks* callbacks) {
+  GetDispatcher()->GetRegistrations(
+      context_->provider_id(), document_url, callbacks);
+}
+
 void WebServiceWorkerProviderImpl::getRegistrationForReady(
     WebServiceWorkerGetRegistrationForReadyCallbacks* callbacks) {
   GetDispatcher()->GetRegistrationForReady(context_->provider_id(), callbacks);