Added quota client for serviceworker. Enables 'clear past <time> data'.

content/browser/service_worker/service_worker_quota_client.h

Index: content/browser/service_worker/service_worker_quota_client.h
diff --git a/content/browser/service_worker/service_worker_quota_client.h b/content/browser/service_worker/service_worker_quota_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..7b69b45c38737ede03e32821adfbef08d6d585f7
--- /dev/null
+++ b/content/browser/service_worker/service_worker_quota_client.h
@@ -0,0 +1,49 @@
+// Copyright 2014 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_QUOTA_CLIENT_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_QUOTA_CLIENT_H_
+
+#include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
+#include "storage/browser/quota/quota_client.h"
+
+namespace content {
+class ServiceWorkerContextWrapper;
+
+class ServiceWorkerQuotaClient : public storage::QuotaClient {
+ public:
+  virtual ~ServiceWorkerQuotaClient();
+
+  // QuotaClient method overrides
+  virtual ID id() const override;
+  virtual void OnQuotaManagerDestroyed() override;
+  virtual void GetOriginUsage(const GURL& origin,
+                              storage::StorageType type,
+                              const GetUsageCallback& callback) override;
+  virtual void GetOriginsForType(storage::StorageType type,
+                                 const GetOriginsCallback& callback) override;
+  virtual void GetOriginsForHost(storage::StorageType type,
+                                 const std::string& host,
+                                 const GetOriginsCallback& callback) override;
+  virtual void DeleteOriginData(const GURL& origin,
+                                storage::StorageType type,
+                                const DeletionCallback& callback) override;
+  virtual bool DoesSupport(storage::StorageType type) const override;
+
+ private:
+  friend class ServiceWorkerContextWrapper;
+  friend class ServiceWorkerQuotaClientTest;
+
+  CONTENT_EXPORT explicit ServiceWorkerQuotaClient(
+      ServiceWorkerContextWrapper* context);
+
+  scoped_refptr<ServiceWorkerContextWrapper> context_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerQuotaClient);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_QUOTA_CLIENT_H_