ServiceWorker: Make '.ready' return a promise to be resolved with ServiceWorkerRegistration (1/3)

Source/modules/serviceworkers/ServiceWorkerRegistration.cpp

Index: Source/modules/serviceworkers/ServiceWorkerRegistration.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerRegistration.cpp b/Source/modules/serviceworkers/ServiceWorkerRegistration.cpp
index 9a1f92fb12bf7a7f961e2b03e26575d680322ca2..96fd73a07562ad2e98fedce87a2d78c4bbd58832 100644
--- a/Source/modules/serviceworkers/ServiceWorkerRegistration.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerRegistration.cpp
@@ -76,11 +76,16 @@ void ServiceWorkerRegistration::setActive(WebServiceWorker* serviceWorker)
     m_active = ServiceWorker::from(executionContext(), serviceWorker);
 }
 
-PassRefPtrWillBeRawPtr<ServiceWorkerRegistration> ServiceWorkerRegistration::take(ScriptPromiseResolver* resolver, WebType* registration)
+PassRefPtrWillBeRawPtr<ServiceWorkerRegistration> ServiceWorkerRegistration::from(ExecutionContext* executionContext, WebType* registration)
 {
     if (!registration)
         return nullptr;
-    return getOrCreate(resolver->scriptState()->executionContext(), registration);
+    return getOrCreate(executionContext, registration);
+}
+
+PassRefPtrWillBeRawPtr<ServiceWorkerRegistration> ServiceWorkerRegistration::take(ScriptPromiseResolver* resolver, WebType* registration)
+{
+    return from(resolver->scriptState()->executionContext(), registration);
 }
 
 void ServiceWorkerRegistration::dispose(WebType* registration)