Use suffixed {uint,int}{8,16,32,64}_t types.

webrtc/base/win32filesystem.h

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 73 matching lines @@
                                  const std::string *append);
 
   // Returns the path to the running application.
   virtual bool GetAppPathname(Pathname* path);
 
   virtual bool GetAppDataFolder(Pathname* path, bool per_user);
 
   // Get a temporary folder that is unique to the current user and application.
   virtual bool GetAppTempFolder(Pathname* path);
 
-  virtual bool GetDiskFreeSpace(const Pathname& path, int64 *free_bytes);
+  virtual bool GetDiskFreeSpace(const Pathname& path, int64_t* free_bytes);
 
   virtual Pathname GetCurrentDirectory();
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_WINFILESYSTEM_H__