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

webrtc/base/unixfilesystem.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 89 matching lines @@
                    time_t* time) override;
 
   // Returns the path to the running application.
   bool GetAppPathname(Pathname* path) override;
 
   bool GetAppDataFolder(Pathname* path, bool per_user) override;
 
   // Get a temporary folder that is unique to the current user and application.
   bool GetAppTempFolder(Pathname* path) override;
 
-  bool GetDiskFreeSpace(const Pathname& path, int64* freebytes) override;
+  bool GetDiskFreeSpace(const Pathname& path, int64_t* freebytes) override;
 
   // Returns the absolute path of the current directory.
   Pathname GetCurrentDirectory() override;
 
  private:
 #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
   static char* provided_app_data_folder_;
   static char* provided_app_temp_folder_;
 #else
   static char* app_temp_path_;
 #endif
 
   static char* CopyString(const std::string& str);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_UNIXFILESYSTEM_H_