Decouple Cache Storage messaging from Service Worker/Embedded Worker

content/renderer/service_worker/embedded_worker_context_client.h

Index: content/renderer/service_worker/embedded_worker_context_client.h
diff --git a/content/renderer/service_worker/embedded_worker_context_client.h b/content/renderer/service_worker/embedded_worker_context_client.h
index 166bcecd311949fb076098ebc171eaf60de6e88a..69cd81167b29d8f4b3bb51335b88c8ffbfbbaf30 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.h
+++ b/content/renderer/service_worker/embedded_worker_context_client.h
@@ -136,6 +136,11 @@ class EmbeddedWorkerContextClient
   }
   ThreadSafeSender* thread_safe_sender() { return sender_.get(); }
 
+  // Only needed by ServiceWorkerScriptContext when creating a
+  // WebServiceWorkerCacheStorageImpl
+  // TODO(jsbell): Remove when no longer needed. crbug.com/439389
+  const GURL origin() const { return service_worker_scope_.GetOrigin(); }
+
  private:
   void OnMessageToWorker(int thread_id,
                          int embedded_worker_id,