LevelDB storage for data reduction proxy to store data usage stats.

components/data_reduction_proxy/core/browser/data_reduction_proxy_store_impl.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_store_impl.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_store_impl.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_store_impl.h
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+// Copyright 2015 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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_STORE_IMPL_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_STORE_IMPL_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_store.h"
+
+namespace leveldb {
+class DB;
+class Iterator;
+class Slice;
+class Status;
+class WriteBatch;
+}
+
+namespace data_reduction_proxy {
+class DataUsageBucket;
+
+// Implementation of DataReductionProxyStore using LevelDB.
+class DataReductionProxyStoreImpl : public DataReductionProxyStore {
+ public:
+  DataReductionProxyStoreImpl(const std::string& profile_path);
+
+  void InitializeOnDBThread() override;
+
+  DataReductionProxyStore::Status Get(const std::string& key,
+                                      std::string& value) override;
+
+  DataReductionProxyStore::Status Put(
+      const std::map<std::string, std::string>* map) override;
+
+ private:
+  // Ref counted classes have private destructors to prevent accidental deletion
+  // of the object when there are still references to it.
+  friend class base::RefCountedThreadSafe<DataReductionProxyStore>;
+  ~DataReductionProxyStoreImpl() override;
+
+  scoped_ptr<leveldb::DB> db_;
+  base::ThreadChecker thread_checker_;
+  const std::string profile_path_;
+
+  DISALLOW_COPY_AND_ASSIGN(DataReductionProxyStoreImpl);
+};
+
+}  // namespace data_reduction_proxy
+
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_STORE_IMPL_H_