Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/webaudio/ScriptProcessorNode.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 54 matching lines @@
         break;
     case 256:
     case 512:
     case 1024:
     case 2048:
     case 4096:
     case 8192:
     case 16384:
         break;
     default:
-        return 0;
+        return nullptr;
     }
 
     if (!numberOfInputChannels && !numberOfOutputChannels)
-        return 0;
+        return nullptr;
 
     if (numberOfInputChannels > AudioContext::maxNumberOfChannels())
-        return 0;
+        return nullptr;
 
     if (numberOfOutputChannels > AudioContext::maxNumberOfChannels())
-        return 0;
+        return nullptr;
 
     return adoptRef(new ScriptProcessorNode(context, sampleRate, bufferSize, numberOfInputChannels, numberOfOutputChannels));
 }
 
 ScriptProcessorNode::ScriptProcessorNode(AudioContext* context, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels)
     : AudioNode(context, sampleRate)
     , m_doubleBufferIndex(0)
     , m_doubleBufferIndexForEvent(0)
     , m_bufferSize(bufferSize)
     , m_bufferReadWriteIndex(0)
@@ skipping 25 matching lines @@
 void ScriptProcessorNode::initialize()
 {
     if (isInitialized())
         return;
 
     float sampleRate = context()->sampleRate();
 
     // Create double buffers on both the input and output sides.
     // These AudioBuffers will be directly accessed in the main thread by JavaScript.
     for (unsigned i = 0; i < 2; ++i) {
-        RefPtr<AudioBuffer> inputBuffer = m_numberOfInputChannels ? AudioBuffer::create(m_numberOfInputChannels, bufferSize(), sampleRate) : 0;
-        RefPtr<AudioBuffer> outputBuffer = m_numberOfOutputChannels ? AudioBuffer::create(m_numberOfOutputChannels, bufferSize(), sampleRate) : 0;
+        RefPtr<AudioBuffer> inputBuffer = m_numberOfInputChannels ? AudioBuffer::create(m_numberOfInputChannels, bufferSize(), sampleRate) : nullptr;
+        RefPtr<AudioBuffer> outputBuffer = m_numberOfOutputChannels ? AudioBuffer::create(m_numberOfOutputChannels, bufferSize(), sampleRate) : nullptr;
 
         m_inputBuffers.append(inputBuffer);
         m_outputBuffers.append(outputBuffer);
     }
 
     AudioNode::initialize();
 }
 
 void ScriptProcessorNode::uninitialize()
 {
@@ skipping 133 matching lines @@
 }
 
 double ScriptProcessorNode::latencyTime() const
 {
     return std::numeric_limits<double>::infinity();
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)