Switch to standard integer types in net/.

net/base/io_buffer.h

 // Copyright (c) 2012 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.
 
 #ifndef NET_BASE_IO_BUFFER_H_
 #define NET_BASE_IO_BUFFER_H_
 
+#include <stddef.h>
+
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/pickle.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 // IOBuffers are reference counted data buffers used for easier asynchronous
@@ skipping 228 matching lines @@
  public:
   explicit WrappedIOBuffer(const char* data);
 
  protected:
   ~WrappedIOBuffer() override;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_IO_BUFFER_H_