Web Animations CSS: Support animation of fill and stroke

Source/core/animation/AnimatableValue.h

Index: Source/core/animation/AnimatableValue.h
diff --git a/Source/core/animation/AnimatableValue.h b/Source/core/animation/AnimatableValue.h
index c06e6bb314ec13ce2f360d49db7a131557fd5cb2..88e622dccfa9362a3987e2ac7adfaeda3e6c7a97 100644
--- a/Source/core/animation/AnimatableValue.h
+++ b/Source/core/animation/AnimatableValue.h
@@ -52,6 +52,7 @@ public:
     bool isLengthSize() const { return type() == TypeLengthSize; }
     bool isNumber() const { return type() == TypeNumber; }
     bool isNeutral() const { return type() == TypeNeutral; }
+    bool isSVGPaint() const { return type() == TypeSVGPaint; }
     bool isTransform() const { return type() == TypeTransform; }
     bool isUnknown() const { return type() == TypeUnknown; }
     bool isVisibility() const { return type() == TypeVisibility; }
@@ -64,6 +65,7 @@ protected:
         TypeLengthSize,
         TypeNeutral,
         TypeNumber,
+        TypeSVGPaint,
         TypeTransform,
         TypeUnknown,
         TypeVisibility,