Update calls to scoped_array<T>::reset(NULL) to use the no-arg version.

media/audio/win/waveout_output_win.cc

 // 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.
 
 #include "media/audio/win/waveout_output_win.h"
 
 #include <windows.h>
 #include <mmsystem.h>
 #pragma comment(lib, "winmm.lib")
 
@@ skipping 150 matching lines @@
     // this does but we can guess that causes the OS to keep a reference to
     // the memory pages so the driver can use them without worries.
     ::waveOutPrepareHeader(waveout_, buffer, sizeof(WAVEHDR));
   }
 }
 
 void PCMWaveOutAudioOutputStream::FreeBuffers() {
   for (int ix = 0; ix != num_buffers_; ++ix) {
     ::waveOutUnprepareHeader(waveout_, GetBuffer(ix), sizeof(WAVEHDR));
   }
-  buffers_.reset(NULL);
+  buffers_.reset();
 }
 
 // Initially we ask the source to fill up all audio buffers. If we don't do
 // this then we would always get the driver callback when it is about to run
 // samples and that would leave too little time to react.
 void PCMWaveOutAudioOutputStream::Start(AudioSourceCallback* callback) {
   if (state_ != PCMA_READY)
     return;
   callback_ = callback;
 
@@ skipping 234 matching lines @@
                                        buffer,
                                        sizeof(WAVEHDR));
       if (result != MMSYSERR_NOERROR)
         stream->HandleError(result);
       stream->pending_bytes_ += buffer->dwBufferLength;
     }
   }
 }
 
 }  // namespace media