Hoist some pre-condition checks out of SVGAngle/SVGEnumeration

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

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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.
  *
@@ skipping 259 matching lines @@
     m_valueInSpecifiedUnits = valueInSpecifiedUnits;
 }
 
 void SVGAngle::newValueSpecifiedUnits(SVGAngleType unitType, float valueInSpecifiedUnits)
 {
     m_orientType->setEnumValue(SVGMarkerOrientAngle);
     m_unitType = unitType;
     m_valueInSpecifiedUnits = valueInSpecifiedUnits;
 }
 
-void SVGAngle::convertToSpecifiedUnits(SVGAngleType unitType, ExceptionState& exceptionState)
+void SVGAngle::convertToSpecifiedUnits(SVGAngleType unitType)
 {
-    if (m_unitType == SVG_ANGLETYPE_UNKNOWN) {
-        exceptionState.throwDOMException(NotSupportedError, "Cannot convert from unknown or invalid units.");
-        return;
-    }
-
     if (unitType == m_unitType)
         return;
 
     switch (m_unitType) {
     case SVG_ANGLETYPE_TURN:
         switch (unitType) {
         case SVG_ANGLETYPE_GRAD:
             m_valueInSpecifiedUnits = turn2grad(m_valueInSpecifiedUnits);
             break;
         case SVG_ANGLETYPE_UNSPECIFIED:
@@ skipping 145 matching lines @@
 
 void SVGAngle::orientTypeChanged()
 {
     if (orientType()->enumValue() == SVGMarkerOrientAuto || orientType()->enumValue() == SVGMarkerOrientAutoStartReverse) {
         m_unitType = SVG_ANGLETYPE_UNSPECIFIED;
         m_valueInSpecifiedUnits = 0;
     }
 }
 
 }