Replace NULL with nullptr in all C++ files.

webrtc/voice_engine/shared_data.cc

Index: webrtc/voice_engine/shared_data.cc
diff --git a/webrtc/voice_engine/shared_data.cc b/webrtc/voice_engine/shared_data.cc
index 41e261bd58c773d344514520782b664069512ac9..63a517215689dc0cf3c5c780da476921ca271faa 100644
--- a/webrtc/voice_engine/shared_data.cc
+++ b/webrtc/voice_engine/shared_data.cc
@@ -26,21 +26,17 @@ SharedData::SharedData()
     : _instanceId(++_gInstanceCounter),
       _channelManager(_gInstanceCounter),
       _engineStatistics(_gInstanceCounter),
-      _audioDevicePtr(NULL),
-      _moduleProcessThreadPtr(
-          ProcessThread::Create("VoiceProcessThread")) {
-    Trace::CreateTrace();
-    if (OutputMixer::Create(_outputMixerPtr, _gInstanceCounter) == 0)
-    {
-        _outputMixerPtr->SetEngineInformation(_engineStatistics);
-    }
-    if (TransmitMixer::Create(_transmitMixerPtr, _gInstanceCounter) == 0)
-    {
-        _transmitMixerPtr->SetEngineInformation(*_moduleProcessThreadPtr,
-                                                _engineStatistics,
-                                                _channelManager);
-    }
-    _audioDeviceLayer = AudioDeviceModule::kPlatformDefaultAudio;
+      _audioDevicePtr(nullptr),
+      _moduleProcessThreadPtr(ProcessThread::Create("VoiceProcessThread")) {
+  Trace::CreateTrace();
+  if (OutputMixer::Create(_outputMixerPtr, _gInstanceCounter) == 0) {
+    _outputMixerPtr->SetEngineInformation(_engineStatistics);
+  }
+  if (TransmitMixer::Create(_transmitMixerPtr, _gInstanceCounter) == 0) {
+    _transmitMixerPtr->SetEngineInformation(*_moduleProcessThreadPtr,
+                                            _engineStatistics, _channelManager);
+  }
+  _audioDeviceLayer = AudioDeviceModule::kPlatformDefaultAudio;
 }
 
 SharedData::~SharedData()