Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_device/linux/audio_mixer_manager_pulse_linux.cc

Index: webrtc/modules/audio_device/linux/audio_mixer_manager_pulse_linux.cc
diff --git a/webrtc/modules/audio_device/linux/audio_mixer_manager_pulse_linux.cc b/webrtc/modules/audio_device/linux/audio_mixer_manager_pulse_linux.cc
index f73a399c9d220ddb11fa96f6dc2053ae3027d3ba..80a5347978fc406d4a1f38ce8729da45e03fd10b 100644
--- a/webrtc/modules/audio_device/linux/audio_mixer_manager_pulse_linux.cc
+++ b/webrtc/modules/audio_device/linux/audio_mixer_manager_pulse_linux.cc
@@ -41,24 +41,23 @@ class AutoPulseLock {
   pa_threaded_mainloop* const pa_mainloop_;
 };
 
-AudioMixerManagerLinuxPulse::AudioMixerManagerLinuxPulse(const int32_t id) :
-    _id(id),
-    _paOutputDeviceIndex(-1),
-    _paInputDeviceIndex(-1),
-    _paPlayStream(NULL),
-    _paRecStream(NULL),
-    _paMainloop(NULL),
-    _paContext(NULL),
-    _paVolume(0),
-    _paMute(0),
-    _paVolSteps(0),
-    _paSpeakerMute(false),
-    _paSpeakerVolume(PA_VOLUME_NORM),
-    _paChannels(0),
-    _paObjectsSet(false)
-{
-    WEBRTC_TRACE(kTraceMemory, kTraceAudioDevice, _id,
-                 "%s constructed", __FUNCTION__);
+AudioMixerManagerLinuxPulse::AudioMixerManagerLinuxPulse(const int32_t id)
+    : _id(id),
+      _paOutputDeviceIndex(-1),
+      _paInputDeviceIndex(-1),
+      _paPlayStream(nullptr),
+      _paRecStream(nullptr),
+      _paMainloop(nullptr),
+      _paContext(nullptr),
+      _paVolume(0),
+      _paMute(0),
+      _paVolSteps(0),
+      _paSpeakerMute(false),
+      _paSpeakerVolume(PA_VOLUME_NORM),
+      _paChannels(0),
+      _paObjectsSet(false) {
+  WEBRTC_TRACE(kTraceMemory, kTraceAudioDevice, _id, "%s constructed",
+               __FUNCTION__);
 }
 
 AudioMixerManagerLinuxPulse::~AudioMixerManagerLinuxPulse()
@@ -108,8 +107,8 @@ int32_t AudioMixerManagerLinuxPulse::Close()
     CloseSpeaker();
     CloseMicrophone();
 
-    _paMainloop = NULL;
-    _paContext = NULL;
+    _paMainloop = nullptr;
+    _paContext = nullptr;
     _paObjectsSet = false;
 
     return 0;
@@ -124,7 +123,7 @@ int32_t AudioMixerManagerLinuxPulse::CloseSpeaker()
 
     // Reset the index to -1
     _paOutputDeviceIndex = -1;
-    _paPlayStream = NULL;
+    _paPlayStream = nullptr;
 
     return 0;
 }
@@ -137,7 +136,7 @@ int32_t AudioMixerManagerLinuxPulse::CloseMicrophone()
 
     // Reset the index to -1
     _paInputDeviceIndex = -1;
-    _paRecStream = NULL;
+    _paRecStream = nullptr;
 
     return 0;
 }
@@ -271,12 +270,10 @@ int32_t AudioMixerManagerLinuxPulse::SetSpeakerVolume(
         pa_cvolume cVolumes;
         LATE(pa_cvolume_set)(&cVolumes, spec->channels, volume);
 
-        pa_operation* paOperation = NULL;
+        pa_operation* paOperation = nullptr;
         paOperation = LATE(pa_context_set_sink_input_volume)(
-            _paContext,
-            LATE(pa_stream_get_index)(_paPlayStream),
-            &cVolumes,
-            PaSetVolumeCallback, NULL);
+            _paContext, LATE(pa_stream_get_index)(_paPlayStream), &cVolumes,
+            PaSetVolumeCallback, nullptr);
         if (!paOperation)
         {
             setFailed = true;
@@ -447,13 +444,10 @@ int32_t AudioMixerManagerLinuxPulse::SetSpeakerMute(bool enable)
         // We can only really mute if we have a connected stream
         AutoPulseLock auto_lock(_paMainloop);
 
-        pa_operation* paOperation = NULL;
+        pa_operation* paOperation = nullptr;
         paOperation = LATE(pa_context_set_sink_input_mute)(
-            _paContext,
-            LATE(pa_stream_get_index)(_paPlayStream),
-            (int) enable,
-            PaSetVolumeCallback,
-            NULL);
+            _paContext, LATE(pa_stream_get_index)(_paPlayStream), (int)enable,
+            PaSetVolumeCallback, nullptr);
         if (!paOperation)
         {
             setFailed = true;
@@ -567,7 +561,7 @@ AudioMixerManagerLinuxPulse::StereoRecordingIsAvailable(bool& available)
         deviceIndex = LATE(pa_stream_get_device_index)(_paRecStream);
     }
 
-    pa_operation* paOperation = NULL;
+    pa_operation* paOperation = nullptr;
 
     // Get info for this source
     // We want to know if the actual device can record in stereo
@@ -619,7 +613,7 @@ int32_t AudioMixerManagerLinuxPulse::SetMicrophoneMute(bool enable)
     }
 
     bool setFailed(false);
-    pa_operation* paOperation = NULL;
+    pa_operation* paOperation = nullptr;
 
     uint32_t deviceIndex = (uint32_t) _paInputDeviceIndex;
 
@@ -636,9 +630,7 @@ int32_t AudioMixerManagerLinuxPulse::SetMicrophoneMute(bool enable)
 
     // Set mute switch for the source
     paOperation = LATE(pa_context_set_source_mute_by_index)(
-        _paContext, deviceIndex,
-        enable,
-        PaSetVolumeCallback, NULL);
+        _paContext, deviceIndex, enable, PaSetVolumeCallback, nullptr);
 
     if (!paOperation)
     {
@@ -814,7 +806,7 @@ AudioMixerManagerLinuxPulse::SetMicrophoneVolume(uint32_t volume)
     }
 
     bool setFailed(false);
-    pa_operation* paOperation = NULL;
+    pa_operation* paOperation = nullptr;
 
     // Get the number of channels for this source
     paOperation
@@ -829,11 +821,8 @@ AudioMixerManagerLinuxPulse::SetMicrophoneVolume(uint32_t volume)
     LATE(pa_cvolume_set)(&cVolumes, channels, volume);
 
     // Set the volume for the source
-    paOperation
-        = LATE(pa_context_set_source_volume_by_index)(_paContext, deviceIndex,
-                                                      &cVolumes,
-                                                      PaSetVolumeCallback,
-                                                      NULL);
+    paOperation = LATE(pa_context_set_source_volume_by_index)(
+        _paContext, deviceIndex, &cVolumes, PaSetVolumeCallback, nullptr);
 
     if (!paOperation)
     {
@@ -952,7 +941,7 @@ int32_t AudioMixerManagerLinuxPulse::MicrophoneVolumeStepSize(
         deviceIndex = LATE(pa_stream_get_device_index)(_paRecStream);
     }
 
-    pa_operation* paOperation = NULL;
+    pa_operation* paOperation = nullptr;
 
     // Get info for this source
     paOperation
@@ -1113,7 +1102,7 @@ void AudioMixerManagerLinuxPulse::WaitForOperationCompletion(
 }
 
 bool AudioMixerManagerLinuxPulse::GetSinkInputInfo() const {
-  pa_operation* paOperation = NULL;
+  pa_operation* paOperation = nullptr;
 
   AutoPulseLock auto_lock(_paMainloop);
   // Get info for this stream (sink input).
@@ -1129,7 +1118,7 @@ bool AudioMixerManagerLinuxPulse::GetSinkInputInfo() const {
 
 bool AudioMixerManagerLinuxPulse::GetSinkInfoByIndex(
     int device_index) const {
-  pa_operation* paOperation = NULL;
+  pa_operation* paOperation = nullptr;
 
   AutoPulseLock auto_lock(_paMainloop);
   paOperation = LATE(pa_context_get_sink_info_by_index)(_paContext,
@@ -1141,7 +1130,7 @@ bool AudioMixerManagerLinuxPulse::GetSinkInfoByIndex(
 
 bool AudioMixerManagerLinuxPulse::GetSourceInfoByIndex(
     int device_index) const {
-  pa_operation* paOperation = NULL;
+  pa_operation* paOperation = nullptr;
 
   AutoPulseLock auto_lock(_paMainloop);
   paOperation  = LATE(pa_context_get_source_info_by_index)(