Replace NULL with nullptr or null in webrtc/base/.

webrtc/base/bytebuffer.cc

 /*
  *  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.
  */
 
 #include "webrtc/base/bytebuffer.h"
 
 #include <string.h>
 
 #include <algorithm>
 
 #include "webrtc/base/basictypes.h"
 #include "webrtc/base/byteorder.h"
 
 namespace rtc {
 
 static const int DEFAULT_SIZE = 4096;
 
 ByteBufferWriter::ByteBufferWriter()
     : ByteBuffer(ORDER_NETWORK) {
-  Construct(NULL, DEFAULT_SIZE);
+  Construct(nullptr, DEFAULT_SIZE);
 }
 
 ByteBufferWriter::ByteBufferWriter(ByteOrder byte_order)
     : ByteBuffer(byte_order) {
-  Construct(NULL, DEFAULT_SIZE);
+  Construct(nullptr, DEFAULT_SIZE);
 }
 
 ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len)
     : ByteBuffer(ORDER_NETWORK) {
   Construct(bytes, len);
 }
 
 ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len,
                                    ByteOrder byte_order)
     : ByteBuffer(byte_order) {
@@ skipping 232 matching lines @@
 }
 
 bool ByteBufferReader::Consume(size_t size) {
   if (size > Length())
     return false;
   start_ += size;
   return true;
 }
 
 }  // namespace rtc