De-ExceptionState-ify SVGLengthContext

Source/core/svg/SVGLengthList.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 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 108 matching lines @@
 
 void SVGLengthList::add(PassRefPtrWillBeRawPtr<SVGPropertyBase> other, SVGElement* contextElement)
 {
     RefPtrWillBeRawPtr<SVGLengthList> otherList = toSVGLengthList(other);
 
     if (length() != otherList->length())
         return;
 
     SVGLengthContext lengthContext(contextElement);
     for (size_t i = 0; i < length(); ++i)
-        at(i)->setValue(at(i)->value(lengthContext) + otherList->at(i)->value(lengthContext), lengthContext, ASSERT_NO_EXCEPTION);
+        at(i)->setValue(at(i)->value(lengthContext) + otherList->at(i)->value(lengthContext), lengthContext);
 }
 
 PassRefPtrWillBeRawPtr<SVGLength> SVGLengthList::createPaddingItem() const
 {
     return SVGLength::create(m_mode);
 }
 
 void SVGLengthList::calculateAnimatedValue(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, PassRefPtrWillBeRawPtr<SVGPropertyBase> fromValue, PassRefPtrWillBeRawPtr<SVGPropertyBase> toValue, PassRefPtrWillBeRawPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement)
 {
     RefPtrWillBeRawPtr<SVGLengthList> fromList = toSVGLengthList(fromValue);
@@ skipping 17 matching lines @@
         if (fromLengthListSize) {
             if (percentage < 0.5)
                 unitType = fromList->at(i)->unitType();
             effectiveFrom = fromList->at(i)->value(lengthContext);
         }
         float effectiveTo = toList->at(i)->value(lengthContext);
         float effectiveToAtEnd = i < toAtEndOfDurationListSize ? toAtEndOfDurationList->at(i)->value(lengthContext) : 0;
 
         animationElement->animateAdditiveNumber(percentage, repeatCount, effectiveFrom, effectiveTo, effectiveToAtEnd, animatedNumber);
         at(i)->setUnitType(unitType);
-        at(i)->setValue(animatedNumber, lengthContext, ASSERT_NO_EXCEPTION);
+        at(i)->setValue(animatedNumber, lengthContext);
     }
 }
 
 float SVGLengthList::calculateDistance(PassRefPtrWillBeRawPtr<SVGPropertyBase> to, SVGElement*)
 {
     // FIXME: Distance calculation is not possible for SVGLengthList right now. We need the distance for every single value.
     return -1;
 }
 }