Add paint() function as valid CSS <image> type.

third_party/WebKit/Source/core/css/CSSValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 60 matching lines @@
     bool isBasicShapeCircleValue() const { return m_classType == BasicShapeCircleClass; }
     bool isBasicShapeEllipseValue() const { return m_classType == BasicShapeEllipseClass; }
     bool isBasicShapePolygonValue() const { return m_classType == BasicShapePolygonClass; }
     bool isBasicShapeInsetValue() const { return m_classType == BasicShapeInsetClass; }
 
     bool isBorderImageSliceValue() const { return m_classType == BorderImageSliceClass; }
     bool isColorValue() const { return m_classType == ColorClass; }
     bool isCounterValue() const { return m_classType == CounterClass; }
     bool isCursorImageValue() const { return m_classType == CursorImageClass; }
     bool isCrossfadeValue() const { return m_classType == CrossfadeClass; }
+    bool isPaintValue() const { return m_classType == PaintClass; }
     bool isFontFeatureValue() const { return m_classType == FontFeatureClass; }
     bool isFontFaceSrcValue() const { return m_classType == FontFaceSrcClass; }
     bool isFunctionValue() const { return m_classType == FunctionClass; }
     bool isCustomIdentValue() const { return m_classType == CustomIdentClass; }
     bool isImageGeneratorValue() const { return m_classType >= CrossfadeClass && m_classType <= RadialGradientClass; }
     bool isGradientValue() const { return m_classType >= LinearGradientClass && m_classType <= RadialGradientClass; }
     bool isImageSetValue() const { return m_classType == ImageSetClass; }
     bool isImageValue() const { return m_classType == ImageClass; }
     bool isImplicitInitialValue() const;
     bool isInheritedValue() const { return m_classType == InheritedClass; }
@@ skipping 51 matching lines @@
         BasicShapeEllipseClass,
         BasicShapePolygonClass,
         BasicShapeInsetClass,
 
         // Image classes.
         ImageClass,
         CursorImageClass,
 
         // Image generator classes.
         CrossfadeClass,
+        PaintClass,
         LinearGradientClass,
         RadialGradientClass,
 
         // Timing function classes.
         CubicBezierTimingFunctionClass,
         StepsTimingFunctionClass,
 
         // Other class types.
         BorderImageSliceClass,
         FontFeatureClass,
@@ skipping 108 matching lines @@
         return false;
     return first->equals(*second);
 }
 
 #define DEFINE_CSS_VALUE_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, CSSValue, value, value->predicate, value.predicate)
 
 } // namespace blink
 
 #endif // CSSValue_h