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

webrtc/base/sha1digest.cc

 /*
  *  Copyright 2015 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.
  */
 
 #include "webrtc/base/sha1digest.h"
 
 namespace rtc {
 
 size_t Sha1Digest::Size() const {
   return kSize;
 }
 
 void Sha1Digest::Update(const void* buf, size_t len) {
-  SHA1Update(&ctx_, static_cast<const uint8*>(buf), len);
+  SHA1Update(&ctx_, static_cast<const uint8_t*>(buf), len);
 }
 
 size_t Sha1Digest::Finish(void* buf, size_t len) {
   if (len < kSize) {
     return 0;
   }
-  SHA1Final(&ctx_, static_cast<uint8*>(buf));
+  SHA1Final(&ctx_, static_cast<uint8_t*>(buf));
   SHA1Init(&ctx_);  // Reset for next use.
   return kSize;
 }
 
 }  // namespace rtc