Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/webaudio/AudioParamTimeline.cpp

 /*
  * Copyright (C) 2011 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 24 matching lines @@
 #include "platform/FloatConversion.h"
 #include "wtf/MathExtras.h"
 #include <algorithm>
 
 using namespace std;
 
 namespace WebCore {
 
 void AudioParamTimeline::setValueAtTime(float value, double time)
 {
-    insertEvent(ParamEvent(ParamEvent::SetValue, value, time, 0, 0, 0));
+    insertEvent(ParamEvent(ParamEvent::SetValue, value, time, 0, 0, nullptr));
 }
 
 void AudioParamTimeline::linearRampToValueAtTime(float value, double time)
 {
-    insertEvent(ParamEvent(ParamEvent::LinearRampToValue, value, time, 0, 0, 0));
+    insertEvent(ParamEvent(ParamEvent::LinearRampToValue, value, time, 0, 0, nullptr));
 }
 
 void AudioParamTimeline::exponentialRampToValueAtTime(float value, double time, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (value <= 0) {
         exceptionState.throwDOMException(
             InvalidStateError,
             "Target value for exponential ramp must be positive: " + String::number(value));
         return;
     }
 
-    insertEvent(ParamEvent(ParamEvent::ExponentialRampToValue, value, time, 0, 0, 0));
+    insertEvent(ParamEvent(ParamEvent::ExponentialRampToValue, value, time, 0, 0, nullptr));
 }
 
 void AudioParamTimeline::setTargetAtTime(float target, double time, double timeConstant)
 {
-    insertEvent(ParamEvent(ParamEvent::SetTarget, target, time, timeConstant, 0, 0));
+    insertEvent(ParamEvent(ParamEvent::SetTarget, target, time, timeConstant, 0, nullptr));
 }
 
 void AudioParamTimeline::setValueCurveAtTime(Float32Array* curve, double time, double duration)
 {
     insertEvent(ParamEvent(ParamEvent::SetValueCurve, 0, time, 0, duration, curve));
 }
 
 static bool isValidNumber(float x)
 {
     return !std::isnan(x) && !std::isinf(x);
@@ skipping 295 matching lines @@
     // to the end of the values buffer.
     for (; writeIndex < numberOfValues; ++writeIndex)
         values[writeIndex] = value;
 
     return value;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)