Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_device/dummy/file_audio_device.cc

Index: webrtc/modules/audio_device/dummy/file_audio_device.cc
diff --git a/webrtc/modules/audio_device/dummy/file_audio_device.cc b/webrtc/modules/audio_device/dummy/file_audio_device.cc
index 3dcb1384e7871158510d8b5986d5f413a0cf4271..a012c9721cb02851ae522c999ae18ff07b7bc18a 100644
--- a/webrtc/modules/audio_device/dummy/file_audio_device.cc
+++ b/webrtc/modules/audio_device/dummy/file_audio_device.cc
@@ -27,25 +27,24 @@ const size_t kRecordingBufferSize =
 
 FileAudioDevice::FileAudioDevice(const int32_t id,
                                  const char* inputFilename,
-                                 const char* outputFilename):
-    _ptrAudioBuffer(NULL),
-    _recordingBuffer(NULL),
-    _playoutBuffer(NULL),
-    _recordingFramesLeft(0),
-    _playoutFramesLeft(0),
-    _critSect(*CriticalSectionWrapper::CreateCriticalSection()),
-    _recordingBufferSizeIn10MS(0),
-    _recordingFramesIn10MS(0),
-    _playoutFramesIn10MS(0),
-    _playing(false),
-    _recording(false),
-    _lastCallPlayoutMillis(0),
-    _lastCallRecordMillis(0),
-    _outputFile(*FileWrapper::Create()),
-    _inputFile(*FileWrapper::Create()),
-    _outputFilename(outputFilename),
-    _inputFilename(inputFilename) {
-}
+                                 const char* outputFilename)
+    : _ptrAudioBuffer(nullptr),
+      _recordingBuffer(nullptr),
+      _playoutBuffer(nullptr),
+      _recordingFramesLeft(0),
+      _playoutFramesLeft(0),
+      _critSect(*CriticalSectionWrapper::CreateCriticalSection()),
+      _recordingBufferSizeIn10MS(0),
+      _recordingFramesIn10MS(0),
+      _playoutFramesIn10MS(0),
+      _playing(false),
+      _recording(false),
+      _lastCallPlayoutMillis(0),
+      _lastCallRecordMillis(0),
+      _outputFile(*FileWrapper::Create()),
+      _inputFile(*FileWrapper::Create()),
+      _outputFilename(outputFilename),
+      _inputFilename(inputFilename) {}
 
 FileAudioDevice::~FileAudioDevice() {
   delete &_outputFile;
@@ -203,7 +202,7 @@ int32_t FileAudioDevice::StartPlayout() {
     LOG(LS_ERROR) << "Failed to open playout file: " << _outputFilename;
     _playing = false;
     delete [] _playoutBuffer;
-    _playoutBuffer = NULL;
+    _playoutBuffer = nullptr;
     return -1;
   }
 
@@ -233,7 +232,7 @@ int32_t FileAudioDevice::StopPlayout() {
 
   _playoutFramesLeft = 0;
   delete [] _playoutBuffer;
-  _playoutBuffer = NULL;
+  _playoutBuffer = nullptr;
   _outputFile.CloseFile();
 
   LOG(LS_INFO) << "Stopped playout capture to output file: "
@@ -261,7 +260,7 @@ int32_t FileAudioDevice::StartRecording() {
     LOG(LS_ERROR) << "Failed to open audio input file: " << _inputFilename;
     _recording = false;
     delete[] _recordingBuffer;
-    _recordingBuffer = NULL;
+    _recordingBuffer = nullptr;
     return -1;
   }
 
@@ -293,7 +292,7 @@ int32_t FileAudioDevice::StopRecording() {
   _recordingFramesLeft = 0;
   if (_recordingBuffer) {
       delete [] _recordingBuffer;
-      _recordingBuffer = NULL;
+      _recordingBuffer = nullptr;
   }
   _inputFile.CloseFile();