drive: Stop using FileCacheEntry related methods in FileCache

chrome/browser/chromeos/drive/resource_metadata_storage.h

 // Copyright 2013 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_DRIVE_RESOURCE_METADATA_STORAGE_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_RESOURCE_METADATA_STORAGE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 148 matching lines @@
 
   // Returns the ID of the parent's child.
   FileError GetChild(const std::string& parent_id,
                      const std::string& child_name,
                      std::string* child_id);
 
   // Returns the IDs of the parent's children.
   FileError GetChildren(const std::string& parent_id,
                         std::vector<std::string>* children);
 
-  // Puts the cache entry to this storage.
-  FileError PutCacheEntry(const std::string& id, const FileCacheEntry& entry);
-
   // Gets a cache entry stored in this storage.
   FileError GetCacheEntry(const std::string& id, FileCacheEntry* out_entry);
 
-  // Removes a cache entry from this storage.
-  FileError RemoveCacheEntry(const std::string& id);
-
-  // Returns an object to iterate over cache entries stored in this storage.
-  scoped_ptr<CacheEntryIterator> GetCacheEntryIterator();
-
   // Returns the local ID associated with the given resource ID.
   FileError GetIdByResourceId(const std::string& resource_id,
                               std::string* out_id);
 
  private:
   friend class ResourceMetadataStorageTest;
 
   // To destruct this object, use Destroy().
   ~ResourceMetadataStorage();
 
@@ skipping 23 matching lines @@
 
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceMetadataStorage);
 };
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_RESOURCE_METADATA_STORAGE_H_