QUIC - (no behavior change) s/NULL/nullptr/g in .../quic/...

net/quic/quic_data_writer.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_QUIC_QUIC_DATA_WRITER_H_
 #define NET_QUIC_QUIC_DATA_WRITER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 48 matching lines @@
   // Return true if there is enough space at that offset, false otherwise.
   bool WriteUInt8ToOffset(uint8 value, size_t offset);
   bool WriteUInt32ToOffset(uint32 value, size_t offset);
   bool WriteUInt48ToOffset(uint64 value, size_t offset);
 
   size_t capacity() const {
     return capacity_;
   }
 
  private:
-  // Returns the location that the data should be written at, or NULL if there
-  // is not enough room. Call EndWrite with the returned offset and the given
-  // length to pad out for the next write.
+  // Returns the location that the data should be written at, or nullptr if
+  // there is not enough room. Call EndWrite with the returned offset and the
+  // given length to pad out for the next write.
   char* BeginWrite(size_t length);
 
   char* buffer_;
   size_t capacity_;  // Allocation size of payload (or -1 if buffer is const).
   size_t length_;    // Current length of the buffer.
 
   DISALLOW_COPY_AND_ASSIGN(QuicDataWriter);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_DATA_WRITER_H_