SVGFilterBuilder::getEffectById never return nullptr

third_party/WebKit/Source/core/svg/SVGFEColorMatrixElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.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,
@@ skipping 75 matching lines @@
         invalidate();
         return;
     }
 
     SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
 }
 
 PassRefPtrWillBeRawPtr<FilterEffect> SVGFEColorMatrixElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
 {
     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
-
-    if (!input1)
-        return nullptr;
+    ASSERT(input1);
 
     ColorMatrixType filterType = m_type->currentValue()->enumValue();
     Vector<float> filterValues = m_values->currentValue()->toFloatVector();
     RefPtrWillBeRawPtr<FilterEffect> effect = FEColorMatrix::create(filter, filterType, filterValues);
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 } // namespace blink