Move GetFreeDiskSpace to SysInfo.

base/sys_info_win.cc

 // Copyright (c) 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.
 
 #include "base/sys_info.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 
@@ skipping 11 matching lines @@
   MEMORYSTATUSEX memory_info;
   memory_info.dwLength = sizeof(memory_info);
   if (!GlobalMemoryStatusEx(&memory_info)) {
     NOTREACHED();
     return 0;
   }
 
   return static_cast<int64>(memory_info.ullTotalPhys);
 }
 
+// static
+int64 SysInfo::AmountOfFreeDiskSpace(const std::wstring& path) {
+  ULARGE_INTEGER available, total, free;
+  if (!GetDiskFreeSpaceExW(path.c_str(), &available, &total, &free)) {
+    return 0;
+  }
+  return static_cast<int64>(available.QuadPart);
+}
+
 }  // namespace base