Rename GDataCache* to DriveCache*

chrome/browser/chromeos/gdata/gdata_cache_metadata.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_CACHE_METADATA_H_
-#define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_METADATA_H_
-
-#include <map>
-#include <vector>
-#include <string>
-
-#include "base/file_path.h"
-#include "base/gtest_prod_util.h"
-#include "chrome/browser/chromeos/gdata/gdata_cache.h"
-
-namespace gdata {
-
-// GDataCacheMetadata is interface to maintain metadata of GDataCache's cached
-// files. This class only manages metadata. File operations are done by
-// GDataCache.
-// All member access including ctor and dtor must be made on the blocking pool.
-class GDataCacheMetadata {
- public:
-  // Callback for Iterate().
-  typedef base::Callback<void(const std::string& resource_id,
-                              const DriveCacheEntry& cache_entry)>
-      IterateCallback;
-
-  // A map table of cache file's resource id to its CacheEntry* entry.
-  typedef std::map<std::string, DriveCacheEntry> CacheMap;
-
-  virtual ~GDataCacheMetadata();
-
-  // Creates GDataCacheMetadata instance.
-  static scoped_ptr<GDataCacheMetadata> CreateGDataCacheMetadata(
-      base::SequencedTaskRunner* blocking_task_runner);
-
-  // Creates GDataCacheMetadata instance. This uses FakeGDataCacheMetadata,
-  // which is an in-memory implmentation and faster than GDataCacheMetadataDB.
-  static scoped_ptr<GDataCacheMetadata> CreateGDataCacheMetadataForTesting(
-      base::SequencedTaskRunner* blocking_task_runner);
-
-  // Initialize the cache metadata store.
-  virtual void Initialize(const std::vector<FilePath>& cache_paths) = 0;
-  // Adds a new cache entry corresponding to |resource_id| if it doesn't
-  // exist, otherwise update the existing entry.
-  virtual void AddOrUpdateCacheEntry(const std::string& resource_id,
-                                     const DriveCacheEntry& cache_entry) = 0;
-
-  // Removes entry corresponding to |resource_id| from cache map.
-  virtual void RemoveCacheEntry(const std::string& resource_id) = 0;
-
-  // Gets the cache entry for file corresponding to |resource_id| and |md5|
-  // and returns true if entry exists in cache map.  Otherwise, returns false.
-  // |md5| can be empty if only matching |resource_id| is desired, which may
-  // happen when looking for pinned entries where symlinks' filenames have no
-  // extension and hence no md5.
-  virtual bool GetCacheEntry(const std::string& resource_id,
-                             const std::string& md5,
-                             DriveCacheEntry* entry) = 0;
-
-  // Removes temporary files (files in CACHE_TYPE_TMP) from the cache map.
-  virtual void RemoveTemporaryFiles() = 0;
-
-  // Iterates over all the cache entries synchronously. |callback| is called
-  // on each cache entry.
-  virtual void Iterate(const IterateCallback& callback) = 0;
-
-  // Force a rescan of cache directories, for testing.
-  virtual void ForceRescanForTesting(
-      const std::vector<FilePath>& cache_paths) = 0;
-
- protected:
-  explicit GDataCacheMetadata(base::SequencedTaskRunner* blocking_task_runner);
-
-  // Checks whether the current thread is on the right sequenced worker pool
-  // with the right sequence ID. If not, DCHECK will fail.
-  void AssertOnSequencedWorkerPool();
-
- private:
-  scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(GDataCacheMetadata);
-};
-
-}  // namespace gdata
-
-#endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_METADATA_H_