Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_processing/echo_control_mobile_impl.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 78 matching lines @@
     RTC_DCHECK(state_);
     return state_;
   }
 
   void Initialize(int sample_rate_hz,
                   unsigned char* external_echo_path,
                   size_t echo_path_size_bytes) {
     RTC_DCHECK(state_);
     int error = WebRtcAecm_Init(state_, sample_rate_hz);
     RTC_DCHECK_EQ(AudioProcessing::kNoError, error);
-    if (external_echo_path != NULL) {
+    if (external_echo_path != nullptr) {
       error = WebRtcAecm_InitEchoPath(state_, external_echo_path,
                                       echo_path_size_bytes);
       RTC_DCHECK_EQ(AudioProcessing::kNoError, error);
     }
   }
 
  private:
   void* state_;
   RTC_DISALLOW_COPY_AND_ASSIGN(Canceller);
 };
 
 EchoControlMobileImpl::EchoControlMobileImpl(rtc::CriticalSection* crit_render,
                                              rtc::CriticalSection* crit_capture)
     : crit_render_(crit_render),
       crit_capture_(crit_capture),
       routing_mode_(kSpeakerphone),
       comfort_noise_enabled_(true),
-      external_echo_path_(NULL) {
+      external_echo_path_(nullptr) {
   RTC_DCHECK(crit_render);
   RTC_DCHECK(crit_capture);
 }
 
 EchoControlMobileImpl::~EchoControlMobileImpl() {
-    if (external_echo_path_ != NULL) {
-      delete [] external_echo_path_;
-      external_echo_path_ = NULL;
+  if (external_echo_path_ != nullptr) {
+    delete[] external_echo_path_;
+    external_echo_path_ = nullptr;
     }
 }
 
 void EchoControlMobileImpl::ProcessRenderAudio(
     rtc::ArrayView<const int16_t> packed_render_audio) {
   rtc::CritScope cs_capture(crit_capture_);
   if (!enabled_) {
     return;
   }
 
@@ skipping 58 matching lines @@
 
   int err = AudioProcessing::kNoError;
 
   // The ordering convention must be followed to pass to the correct AECM.
   size_t handle_index = 0;
   for (size_t capture = 0; capture < audio->num_channels(); ++capture) {
     // TODO(ajm): improve how this works, possibly inside AECM.
     //            This is kind of hacked up.
     const int16_t* noisy = audio->low_pass_reference(capture);
     const int16_t* clean = audio->split_bands_const(capture)[kBand0To8kHz];
-    if (noisy == NULL) {
+    if (noisy == nullptr) {
       noisy = clean;
-      clean = NULL;
+      clean = nullptr;
     }
     for (size_t render = 0; render < stream_properties_->num_reverse_channels;
          ++render) {
       err = WebRtcAecm_Process(cancellers_[handle_index]->state(), noisy, clean,
                                audio->split_bands(capture)[kBand0To8kHz],
                                audio->num_frames_per_band(), stream_delay_ms);
 
       if (err != AudioProcessing::kNoError) {
         return MapError(err);
       }
@@ skipping 69 matching lines @@
 bool EchoControlMobileImpl::is_comfort_noise_enabled() const {
   rtc::CritScope cs(crit_capture_);
   return comfort_noise_enabled_;
 }
 
 int EchoControlMobileImpl::SetEchoPath(const void* echo_path,
                                        size_t size_bytes) {
   {
     rtc::CritScope cs_render(crit_render_);
     rtc::CritScope cs_capture(crit_capture_);
-    if (echo_path == NULL) {
+    if (echo_path == nullptr) {
       return AudioProcessing::kNullPointerError;
     }
     if (size_bytes != echo_path_size_bytes()) {
       // Size mismatch
       return AudioProcessing::kBadParameterError;
     }
 
-    if (external_echo_path_ == NULL) {
+    if (external_echo_path_ == nullptr) {
       external_echo_path_ = new unsigned char[size_bytes];
     }
     memcpy(external_echo_path_, echo_path, size_bytes);
   }
 
   // TODO(peah): Simplify once the Enable function has been removed from
   // the public APM API.
   RTC_DCHECK(stream_properties_);
   Initialize(stream_properties_->sample_rate_hz,
              stream_properties_->num_reverse_channels,
              stream_properties_->num_output_channels);
   return AudioProcessing::kNoError;
 }
 
 int EchoControlMobileImpl::GetEchoPath(void* echo_path,
                                        size_t size_bytes) const {
   rtc::CritScope cs(crit_capture_);
-  if (echo_path == NULL) {
+  if (echo_path == nullptr) {
     return AudioProcessing::kNullPointerError;
   }
   if (size_bytes != echo_path_size_bytes()) {
     // Size mismatch
     return AudioProcessing::kBadParameterError;
   }
   if (!enabled_) {
     return AudioProcessing::kNotEnabledError;
   }
 
@@ skipping 49 matching lines @@
   for (auto& canceller : cancellers_) {
     int handle_error = WebRtcAecm_set_config(canceller->state(), config);
     if (handle_error != AudioProcessing::kNoError) {
       error = handle_error;
     }
   }
   return error;
 }
 
 }  // namespace webrtc