SVGFilterBuilder::getEffectById never return nullptr

third_party/WebKit/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 141 matching lines @@
         invalidate();
         return;
     }
 
     SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
 }
 
 PassRefPtrWillBeRawPtr<FilterEffect> SVGFEConvolveMatrixElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
 {
     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
-
-    if (!input1)
-        return nullptr;
+    ASSERT(input1);
 
     int orderXValue = orderX()->currentValue()->value();
     int orderYValue = orderY()->currentValue()->value();
     if (!m_order->isSpecified()) {
         orderXValue = 3;
         orderYValue = 3;
     }
 
     int targetXValue = m_targetX->currentValue()->value();
     // The spec says the default value is: targetX = floor ( orderX / 2 ))
@@ skipping 17 matching lines @@
 
     RefPtrWillBeRawPtr<FilterEffect> effect = FEConvolveMatrix::create(filter,
         IntSize(orderXValue, orderYValue), divisorValue,
         m_bias->currentValue()->value(), IntPoint(targetXValue, targetYValue), m_edgeMode->currentValue()->enumValue(),
         m_preserveAlpha->currentValue()->value(), m_kernelMatrix->currentValue()->toFloatVector());
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 } // namespace blink