Reland of [ServiceWorkerCache] Implement storage::QuotaClient

content/browser/service_worker/service_worker_cache_quota_client.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 STORAGE_BROWSER_DATABASE_DATABASE_QUOTA_CLIENT_H_
-#define STORAGE_BROWSER_DATABASE_DATABASE_QUOTA_CLIENT_H_
+#ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_QUOTA_CLIENT_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_QUOTA_CLIENT_H_
 
-#include <set>
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
 #include "storage/browser/quota/quota_client.h"
-#include "storage/browser/storage_browser_export.h"
 #include "storage/common/quota/quota_types.h"
 
 namespace storage {
+class QuotaManagerProxy;
+}
 
-class DatabaseTracker;
+namespace content {
+class ServiceWorkerCacheStorageManager;
 
-// A QuotaClient implementation to integrate WebSQLDatabases
-// with the quota  management system. This interface is used
-// on the IO thread by the quota manager.
-class STORAGE_EXPORT_PRIVATE DatabaseQuotaClient
+// ServiceWorkerCacheQuotaClient is owned by the QuotaManager. There is one per
+// ServiceWorkerCacheStorageManager, and therefore one per
+// ServiceWorkerContextCore.
+class CONTENT_EXPORT ServiceWorkerCacheQuotaClient
     : public storage::QuotaClient {
  public:
-  DatabaseQuotaClient(
-      base::MessageLoopProxy* tracker_thread,
-      DatabaseTracker* tracker);
-  virtual ~DatabaseQuotaClient();
+  explicit ServiceWorkerCacheQuotaClient(
+      base::WeakPtr<ServiceWorkerCacheStorageManager> cache_manager);
+  virtual ~ServiceWorkerCacheQuotaClient();
 
-  // QuotaClient method overrides
+  // QuotaClient overrides
   virtual ID id() const override;
   virtual void OnQuotaManagerDestroyed() override;
   virtual void GetOriginUsage(const GURL& origin_url,
                               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:
-  scoped_refptr<base::MessageLoopProxy> db_tracker_thread_;
-  scoped_refptr<DatabaseTracker> db_tracker_;  // only used on its thread
+  base::WeakPtr<ServiceWorkerCacheStorageManager> cache_manager_;
 
-  DISALLOW_COPY_AND_ASSIGN(DatabaseQuotaClient);
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerCacheQuotaClient);
 };
 
-}  // namespace storage
+}  // namespace content
 
-#endif  // STORAGE_BROWSER_DATABASE_DATABASE_QUOTA_CLIENT_H_
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_QUOTA_CLIENT_H_