Hoist some pre-condition checks out of SVGAngle/SVGEnumeration

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

 /*
  * 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 74 matching lines @@
 
     SVGAngleType unitType() const { return m_unitType; }
 
     void setValue(float);
     float value() const;
 
     void setValueInSpecifiedUnits(float valueInSpecifiedUnits) { m_valueInSpecifiedUnits = valueInSpecifiedUnits; }
     float valueInSpecifiedUnits() const { return m_valueInSpecifiedUnits; }
 
     void newValueSpecifiedUnits(SVGAngleType unitType, float valueInSpecifiedUnits);
-    void convertToSpecifiedUnits(SVGAngleType unitType, ExceptionState&);
+    void convertToSpecifiedUnits(SVGAngleType unitType);
 
     SVGEnumeration<SVGMarkerOrientType>* orientType() { return m_orientType.get(); }
     const SVGEnumeration<SVGMarkerOrientType>* orientType() const { return m_orientType.get(); }
     void orientTypeChanged();
 
     // SVGPropertyBase:
 
     PassRefPtrWillBeRawPtr<SVGAngle> clone() const;
 
     String valueAsString() const override;
@@ skipping 21 matching lines @@
 inline PassRefPtrWillBeRawPtr<SVGAngle> toSVGAngle(PassRefPtrWillBeRawPtr<SVGPropertyBase> passBase)
 {
     RefPtrWillBeRawPtr<SVGPropertyBase> base = passBase;
     ASSERT(base->type() == SVGAngle::classType());
     return static_pointer_cast<SVGAngle>(base.release());
 }
 
 } // namespace blink
 
 #endif // SVGAngle_h