Replace NULL with nullptr in all C++ files.

webrtc/voice_engine/file_player.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 235 matching lines @@
     }
     SetAudioScaling(volumeScaling);
   } else if (_fileFormat == kFileFormatPreencodedFile) {
     if (_fileModule.StartPlayingAudioFile(fileName, notification, loop,
                                           _fileFormat, codecInst) == -1) {
       LOG(LS_WARNING) << "StartPlayingFile() failed to initialize "
                       << "pre-encoded file " << fileName;
       return -1;
     }
   } else {
-    CodecInst* no_inst = NULL;
+    CodecInst* no_inst = nullptr;
     if (_fileModule.StartPlayingAudioFile(fileName, notification, loop,
                                           _fileFormat, no_inst, startPosition,
                                           stopPosition) == -1) {
       LOG(LS_WARNING) << "StartPlayingFile() failed to initialize file "
                       << fileName;
       return -1;
     }
     SetAudioScaling(volumeScaling);
   }
   if (SetUpAudioDecoder() == -1) {
@@ skipping 45 matching lines @@
     }
 
   } else if (_fileFormat == kFileFormatPreencodedFile) {
     if (_fileModule.StartPlayingAudioStream(*sourceStream, notification,
                                             _fileFormat, codecInst) == -1) {
       LOG(LS_ERROR) << "StartPlayingFile() failed to initialize stream "
                     << "playout.";
       return -1;
     }
   } else {
-    CodecInst* no_inst = NULL;
+    CodecInst* no_inst = nullptr;
     if (_fileModule.StartPlayingAudioStream(*sourceStream, notification,
                                             _fileFormat, no_inst, startPosition,
                                             stopPosition) == -1) {
       LOG(LS_ERROR) << "StartPlayingFile() failed to initialize stream "
                     << "playout.";
       return -1;
     }
   }
   SetAudioScaling(volumeScaling);
 
@@ skipping 50 matching lines @@
       // audio formats
       return std::unique_ptr<FilePlayer>(
           new FilePlayerImpl(instanceID, fileFormat));
     default:
       assert(false);
       return nullptr;
   }
 }
 
 }  // namespace webrtc