More scaffolding, add class ServiceWorkerProviderHost.

content/browser/service_worker/service_worker_provider_host.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_
+
+#include "base/memory/ref_counted.h"
+
+namespace content {
+
+class ServiceWorkerVersion;
+
+// This class is the browser-process representation of a serice worker
+// provider. There is a provider per document and the lifetime of this
+// object is tied to the lifetime of its document in the renderer process.
+// This class holds service worker state this is scoped to an individual
+// document.
+class ServiceWorkerProviderHost {
+ public:
+  ServiceWorkerProviderHost(int process_id,
+                            int provider_id);
+  ~ServiceWorkerProviderHost();
+
+  int process_id() const { return process_id_; }
+  int provider_id() const { return provider_id_; }
+
+  // The service worker version that corresponds with navigator.serviceWorker
+  // for our document.
+  ServiceWorkerVersion* associated_version() const {
+    return  associated_version_.get();
+  }
+
+ private:
+  const int process_id_;
+  const int provider_id_;
+  scoped_refptr<ServiceWorkerVersion> associated_version_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_