Remove #pragma once from content

content/browser/speech/audio_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 CONTENT_BROWSER_SPEECH_AUDIO_BUFFER_H_
 #define CONTENT_BROWSER_SPEECH_AUDIO_BUFFER_H_
-#pragma once
 
 #include <deque>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
 namespace speech {
 
@@ skipping 50 matching lines @@
   typedef std::deque<scoped_refptr<AudioChunk> > ChunksContainer;
   ChunksContainer chunks_;
   int bytes_per_sample_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioBuffer);
 };
 
 }  // namespace speech
 
 #endif  // CONTENT_BROWSER_SPEECH_AUDIO_BUFFER_H_