Add support for additional blend modes to SVGFEBlendElement

Source/core/svg/SVGFEBlendElement.h

 /*
  * 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 16 matching lines @@
 namespace blink {
 
 class SVGFEBlendElement FINAL : public SVGFilterPrimitiveStandardAttributes {
 public:
     enum Mode {
         ModeUnknown = 0,
         ModeNormal = 1,
         ModeMultiply = 2,
         ModeScreen = 3,
         ModeDarken = 4,
-        ModeLighten = 5
+        ModeLighten = 5,
+
+        // The following modes do not map to IDL constants on
+        // SVGFEBlendElement.
+        ModeOverlay,
+        ModeColorDodge,
+        ModeColorBurn,
+        ModeHardLight,
+        ModeSoftLight,
+        ModeDifference,
+        ModeExclusion,
+        ModeHue,
+        ModeSaturation,
+        ModeColor,
+        ModeLuminosity,
     };
 
     DECLARE_NODE_FACTORY(SVGFEBlendElement);
     SVGAnimatedString* in1() { return m_in1.get(); }
     SVGAnimatedString* in2() { return m_in2.get(); }
     SVGAnimatedEnumeration<Mode>* mode() { return m_mode.get(); }
 
 private:
     explicit SVGFEBlendElement(Document&);
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool setFilterEffectAttribute(FilterEffect*, const QualifiedName& attrName) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
     virtual PassRefPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) OVERRIDE;
 
     RefPtr<SVGAnimatedString> m_in1;
     RefPtr<SVGAnimatedString> m_in2;
     RefPtr<SVGAnimatedEnumeration<Mode> > m_mode;
 };
 
 template<> const SVGEnumerationStringEntries& getStaticStringEntries<SVGFEBlendElement::Mode>();
+template<> unsigned short getMaxExposedEnumValue<SVGFEBlendElement::Mode>();
 
 } // namespace blink
 
 #endif