gdata: Remove obsolete GDataDB related code

chrome/browser/chromeos/gdata/gdata_leveldb.h

-// Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_GDATA_GDATA_LEVELDB_H_
-#define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_LEVELDB_H_
-
-#include <leveldb/db.h>
-#include <string>
-
-#include "base/file_path.h"
-#include "chrome/browser/chromeos/gdata/gdata_db.h"
-
-namespace gdata {
-
-class GDataLevelDB : public GDataDB {
- public:
-  GDataLevelDB();
-
-  void Init(const FilePath& db_path);
-
- private:
-  virtual ~GDataLevelDB();
-
-  // GDataDB implementation.
-  virtual Status Put(const GDataEntry& file) OVERRIDE;
-  virtual Status DeleteByResourceId(const std::string& resource_id) OVERRIDE;
-  virtual Status DeleteByPath(const FilePath& path) OVERRIDE;
-  virtual Status GetByResourceId(const std::string& resource_id,
-                                 scoped_ptr<GDataEntry>* file) OVERRIDE;
-  virtual Status GetByPath(const FilePath& path,
-                           scoped_ptr<GDataEntry>* file) OVERRIDE;
-  virtual scoped_ptr<GDataDBIter> CreateIterator(const FilePath& path) OVERRIDE;
-  virtual Status PutRawForTesting(const std::string& resource_id,
-                                  const std::string& raw_value) OVERRIDE;
-
-  // Returns |resource_id| for |path| by looking up path_db_.
-  Status ResourceIdForPath(const FilePath& path, std::string* resource_id);
-
-  scoped_ptr<leveldb::DB> level_db_;
-};
-
-class GDataLevelDBIter : public GDataDBIter {
- public:
-  GDataLevelDBIter(scoped_ptr<leveldb::Iterator> level_db_iter,
-                   GDataDB* db, const FilePath& path);
- private:
-  virtual ~GDataLevelDBIter();
-
-  // GDataDBIter implementation.
-  virtual bool GetNext(std::string* path,
-                       scoped_ptr<GDataEntry>* entry) OVERRIDE;
-
-  scoped_ptr<leveldb::Iterator> level_db_iter_;
-  GDataDB* db_;
-  const FilePath path_;
-};
-
-}  // namespace gdata
-
-#endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_LEVELDB_H_