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

talk/app/webrtc/objc/RTCDataChannel.mm

 /*
  * libjingle
  * Copyright 2014 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 25 matching lines @@
 namespace webrtc {
 
 class RTCDataChannelObserver : public DataChannelObserver {
  public:
   RTCDataChannelObserver(RTCDataChannel* channel) { _channel = channel; }
 
   void OnStateChange() override {
     [_channel.delegate channelDidChangeState:_channel];
   }
 
-  void OnBufferedAmountChange(uint64 previousAmount) override {
+  void OnBufferedAmountChange(uint64_t previousAmount) override {
     RTCDataChannel* channel = _channel;
     id<RTCDataChannelDelegate> delegate = channel.delegate;
     if ([delegate
             respondsToSelector:@selector(channel:didChangeBufferedAmount:)]) {
       [delegate channel:channel didChangeBufferedAmount:previousAmount];
     }
   }
 
   void OnMessage(const DataBuffer& buffer) override {
     if (!_channel.delegate) {
@@ skipping 224 matching lines @@
     _observer.reset(new webrtc::RTCDataChannelObserver(self));
   }
   return self;
 }
 
 - (rtc::scoped_refptr<webrtc::DataChannelInterface>)dataChannel {
   return _dataChannel;
 }
 
 @end