Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/svg/SVGFEConvolveMatrixElement.cpp

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 180 matching lines @@
     }
 
     ASSERT_NOT_REACHED();
 }
 
 PassRefPtr<FilterEffect> SVGFEConvolveMatrixElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
 {
     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
 
     if (!input1)
-        return 0;
+        return nullptr;
 
     int orderXValue = orderX()->currentValue()->value();
     int orderYValue = orderY()->currentValue()->value();
     if (!hasAttribute(SVGNames::orderAttr)) {
         orderXValue = 3;
         orderYValue = 3;
     }
     // Spec says order must be > 0. Bail if it is not.
     if (orderXValue < 1 || orderYValue < 1)
-        return 0;
+        return nullptr;
     RefPtr<SVGNumberList> kernelMatrix = this->m_kernelMatrix->currentValue();
     size_t kernelMatrixSize = kernelMatrix->numberOfItems();
     // The spec says this is a requirement, and should bail out if fails
     if (orderXValue * orderYValue != static_cast<int>(kernelMatrixSize))
-        return 0;
+        return nullptr;
 
     int targetXValue = m_targetX->currentValue()->value();
     int targetYValue = m_targetY->currentValue()->value();
     if (hasAttribute(SVGNames::targetXAttr) && (targetXValue < 0 || targetXValue >= orderXValue))
-        return 0;
+        return nullptr;
     // The spec says the default value is: targetX = floor ( orderX / 2 ))
     if (!hasAttribute(SVGNames::targetXAttr))
         targetXValue = static_cast<int>(floorf(orderXValue / 2));
     if (hasAttribute(SVGNames::targetYAttr) && (targetYValue < 0 || targetYValue >= orderYValue))
-        return 0;
+        return nullptr;
     // The spec says the default value is: targetY = floor ( orderY / 2 ))
     if (!hasAttribute(SVGNames::targetYAttr))
         targetYValue = static_cast<int>(floorf(orderYValue / 2));
 
     // Spec says default kernelUnitLength is 1.0, and a specified length cannot be 0.
     // FIXME: Why is this cast from float -> int -> float?
     int kernelUnitLengthXValue = kernelUnitLengthX()->currentValue()->value();
     int kernelUnitLengthYValue = kernelUnitLengthY()->currentValue()->value();
     if (!hasAttribute(SVGNames::kernelUnitLengthAttr)) {
         kernelUnitLengthXValue = 1;
         kernelUnitLengthYValue = 1;
     }
     if (kernelUnitLengthXValue <= 0 || kernelUnitLengthYValue <= 0)
-        return 0;
+        return nullptr;
 
     float divisorValue = m_divisor->currentValue()->value();
     if (hasAttribute(SVGNames::divisorAttr) && !divisorValue)
-        return 0;
+        return nullptr;
     if (!hasAttribute(SVGNames::divisorAttr)) {
         for (size_t i = 0; i < kernelMatrixSize; ++i)
             divisorValue += kernelMatrix->at(i)->value();
         if (!divisorValue)
             divisorValue = 1;
     }
 
     RefPtr<FilterEffect> effect = FEConvolveMatrix::create(filter,
                     IntSize(orderXValue, orderYValue), divisorValue,
                     m_bias->currentValue()->value(), IntPoint(targetXValue, targetYValue), m_edgeMode->currentValue()->enumValue(),
                     FloatPoint(kernelUnitLengthXValue, kernelUnitLengthYValue), m_preserveAlpha->currentValue()->value(), m_kernelMatrix->currentValue()->toFloatVector());
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 } // namespace WebCore