Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/platform/audio/AudioBus.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 36 matching lines @@
 namespace WebCore {
 
 using namespace VectorMath;
 
 const unsigned MaxBusChannels = 32;
 
 PassRefPtr<AudioBus> AudioBus::create(unsigned numberOfChannels, size_t length, bool allocate)
 {
     ASSERT(numberOfChannels <= MaxBusChannels);
     if (numberOfChannels > MaxBusChannels)
-        return 0;
+        return nullptr;
 
     return adoptRef(new AudioBus(numberOfChannels, length, allocate));
 }
 
 AudioBus::AudioBus(unsigned numberOfChannels, size_t length, bool allocate)
     : m_length(length)
     , m_busGain(1)
     , m_isFirstTime(true)
     , m_sampleRate(0)
 {
@@ skipping 105 matching lines @@
 
 PassRefPtr<AudioBus> AudioBus::createBufferFromRange(const AudioBus* sourceBuffer, unsigned startFrame, unsigned endFrame)
 {
     size_t numberOfSourceFrames = sourceBuffer->length();
     unsigned numberOfChannels = sourceBuffer->numberOfChannels();
 
     // Sanity checking
     bool isRangeSafe = startFrame < endFrame && endFrame <= numberOfSourceFrames;
     ASSERT(isRangeSafe);
     if (!isRangeSafe)
-        return 0;
+        return nullptr;
 
     size_t rangeLength = endFrame - startFrame;
 
     RefPtr<AudioBus> audioBus = create(numberOfChannels, rangeLength);
     audioBus->setSampleRate(sourceBuffer->sampleRate());
 
     for (unsigned i = 0; i < numberOfChannels; ++i)
         audioBus->channel(i)->copyFromRange(sourceBuffer->channel(i), startFrame, endFrame);
 
     return audioBus;
@@ skipping 329 matching lines @@
         float* destination = channel(channelIndex)->mutableData();
         vmul(source, 1, gainValues, 1, destination, 1, numberOfGainValues);
     }
 }
 
 PassRefPtr<AudioBus> AudioBus::createBySampleRateConverting(const AudioBus* sourceBus, bool mixToMono, double newSampleRate)
 {
     // sourceBus's sample-rate must be known.
     ASSERT(sourceBus && sourceBus->sampleRate());
     if (!sourceBus || !sourceBus->sampleRate())
-        return 0;
+        return nullptr;
 
     double sourceSampleRate = sourceBus->sampleRate();
     double destinationSampleRate = newSampleRate;
     double sampleRateRatio = sourceSampleRate / destinationSampleRate;
     unsigned numberOfSourceChannels = sourceBus->numberOfChannels();
 
     if (numberOfSourceChannels == 1)
         mixToMono = false; // already mono
 
     if (sourceSampleRate == destinationSampleRate) {
@@ skipping 66 matching lines @@
             for (unsigned i = 0; i < n; ++i)
                 destination[i] = (sourceL[i] + sourceR[i]) / 2;
 
             destinationBus->clearSilentFlag();
             destinationBus->setSampleRate(sourceBus->sampleRate());
             return destinationBus;
         }
     }
 
     ASSERT_NOT_REACHED();
-    return 0;
+    return nullptr;
 }
 
 bool AudioBus::isSilent() const
 {
     for (size_t i = 0; i < m_channels.size(); ++i) {
         if (!m_channels[i]->isSilent())
             return false;
     }
     return true;
 }
 
 void AudioBus::clearSilentFlag()
 {
     for (size_t i = 0; i < m_channels.size(); ++i)
         m_channels[i]->clearSilentFlag();
 }
 
 PassRefPtr<AudioBus> decodeAudioFileData(const char* data, size_t size, double sampleRate)
 {
     blink::WebAudioBus webAudioBus;
     if (blink::Platform::current()->loadAudioResource(&webAudioBus, data, size, sampleRate))
         return webAudioBus.release();
-    return 0;
+    return nullptr;
 }
 
 PassRefPtr<AudioBus> AudioBus::loadPlatformResource(const char* name, float sampleRate)
 {
     const blink::WebData& resource = blink::Platform::current()->loadResource(name);
     if (resource.isEmpty())
-        return 0;
+        return nullptr;
 
     // FIXME: the sampleRate parameter is ignored. It should be removed from the API.
     RefPtr<AudioBus> audioBus = decodeAudioFileData(resource.data(), resource.size(), sampleRate);
 
     if (!audioBus.get())
-        return 0;
+        return nullptr;
 
     // If the bus is already at the requested sample-rate then return as is.
     if (audioBus->sampleRate() == sampleRate)
         return audioBus;
 
     return AudioBus::createBySampleRateConverting(audioBus.get(), false, sampleRate);
 }
 
 PassRefPtr<AudioBus> createBusFromInMemoryAudioFile(const void* data, size_t dataSize, bool mixToMono, float sampleRate)
 {
     // FIXME: the sampleRate parameter is ignored. It should be removed from the API.
     RefPtr<AudioBus> audioBus = decodeAudioFileData(static_cast<const char*>(data), dataSize, sampleRate);
     if (!audioBus.get())
-        return 0;
+        return nullptr;
 
     // If the bus needs no conversion then return as is.
     if ((!mixToMono || audioBus->numberOfChannels() == 1) && audioBus->sampleRate() == sampleRate)
         return audioBus;
 
     return AudioBus::createBySampleRateConverting(audioBus.get(), mixToMono, sampleRate);
 }
 
 } // WebCore
 
 #endif // ENABLE(WEB_AUDIO)