Move GetFreeDiskSpace to SysInfo.

net/disk_cache/cache_util.h

 // Copyright (c) 2006-2008 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 NET_DISK_CACHE_CACHE_UTIL_H_
 #define NET_DISK_CACHE_CACHE_UTIL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 
 namespace disk_cache {
 
-// Returns the available disk space on the volume that contains |path|
-// (in bytes), or -1 on failure.
-int64 GetFreeDiskSpace(const std::wstring& path);
-
 // Moves the cache files from the given path to another location.
 // Returns true if successful, false otherwise.
 bool MoveCache(const std::wstring& from_path, const std::wstring& to_path);
 
 // Deletes the cache files stored on |path|, and optionally also attempts to
 // delete the folder itself.
 void DeleteCache(const std::wstring& path, bool remove_folder);
 
 // Deletes a cache file.
 bool DeleteCacheFile(const std::wstring& name);
 
 // Blocks until |num_pending_io| IO operations complete.
 void WaitForPendingIO(int* num_pending_io);
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_CACHE_UTIL_H_