Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/webaudio/AudioBuffer.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 35 matching lines @@
 }
 
 float AudioBuffer::maxAllowedSampleRate()
 {
     return 96000;
 }
 
 PassRefPtr<AudioBuffer> AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
 {
     if (sampleRate < minAllowedSampleRate() || sampleRate > maxAllowedSampleRate() || numberOfChannels > AudioContext::maxNumberOfChannels() || !numberOfFrames)
-        return 0;
+        return nullptr;
 
     RefPtr<AudioBuffer> buffer = adoptRef(new AudioBuffer(numberOfChannels, numberOfFrames, sampleRate));
 
     if (!buffer->createdSuccessfully(numberOfChannels))
-        return 0;
+        return nullptr;
     return buffer;
 }
 
 PassRefPtr<AudioBuffer> AudioBuffer::createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate)
 {
     RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(data, dataSize, mixToMono, sampleRate);
     if (bus.get()) {
         RefPtr<AudioBuffer> buffer = adoptRef(new AudioBuffer(bus.get()));
         if (buffer->createdSuccessfully(bus->numberOfChannels()))
             return buffer;
     }
 
-    return 0;
+    return nullptr;
 }
 
 bool AudioBuffer::createdSuccessfully(unsigned desiredNumberOfChannels) const
 {
     return numberOfChannels() == desiredNumberOfChannels;
 }
 
 AudioBuffer::AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
     : m_gain(1.0)
     , m_sampleRate(sampleRate)
@@ skipping 34 matching lines @@
         channelDataArray->setNeuterable(false);
         channelDataArray->setRange(bus->channel(i)->data(), m_length, 0);
         m_channels.append(channelDataArray);
     }
 }
 
 PassRefPtr<Float32Array> AudioBuffer::getChannelData(unsigned channelIndex, ExceptionState& exceptionState)
 {
     if (channelIndex >= m_channels.size()) {
         exceptionState.throwDOMException(IndexSizeError, "channel index (" + String::number(channelIndex) + ") exceeds number of channels (" + String::number(m_channels.size()) + ")");
-        return 0;
+        return nullptr;
     }
 
     Float32Array* channelData = m_channels[channelIndex].get();
     return Float32Array::create(channelData->buffer(), channelData->byteOffset(), channelData->length());
 }
 
 Float32Array* AudioBuffer::getChannelData(unsigned channelIndex)
 {
     if (channelIndex >= m_channels.size())
         return 0;
 
     return m_channels[channelIndex].get();
 }
 
 void AudioBuffer::zero()
 {
     for (unsigned i = 0; i < m_channels.size(); ++i) {
         if (getChannelData(i))
             getChannelData(i)->zeroRange(0, length());
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)