static PassRefPtr<AnimatableValue> createFromBorderImageLength(
const BorderImageLength& borderImageLength,
const ComputedStyle& style) {
if (borderImageLength.isNumber())
return createFromDouble(borderImageLength.number());
return createFromLength(borderImageLength.length(), style);
}
static LayoutUnit computeEdgeWidth(const BorderImageLength& borderSlice, int borderSide, const LayoutUnit& imageSide,
const LayoutUnit& boxExtent)
{
if (borderSlice.isNumber())
return borderSlice.number() * borderSide;
if (borderSlice.length().isAuto())
return imageSide;
return valueForLength(borderSlice.length(), boxExtent);
}