Fix animation of auto for -webkit-column-count and -webkit-column-width

Source/core/animation/css/CSSAnimatableValueFactory.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 460 matching lines @@
         return createFromLength(style.top(), style);
     case CSSPropertyWebkitBorderHorizontalSpacing:
         return createFromDouble(style.horizontalBorderSpacing());
     case CSSPropertyWebkitBorderVerticalSpacing:
         return createFromDouble(style.verticalBorderSpacing());
     case CSSPropertyWebkitClipPath:
         if (ClipPathOperation* operation = style.clipPath())
             return AnimatableClipPathOperation::create(operation);
         return AnimatableUnknown::create(CSSValueNone);
     case CSSPropertyWebkitColumnCount:
+        if (style.hasAutoColumnCount())
+            return AnimatableUnknown::create(CSSValueAuto);
         return createFromDouble(style.columnCount());
     case CSSPropertyWebkitColumnGap:
         return createFromDouble(style.columnGap());
     case CSSPropertyWebkitColumnRuleColor:
         return createFromColor(property, style);
     case CSSPropertyWebkitColumnRuleWidth:
         return createFromDouble(style.columnRuleWidth());
     case CSSPropertyWebkitColumnWidth:
+        if (style.hasAutoColumnWidth())
+            return AnimatableUnknown::create(CSSValueAuto);
         return createFromDouble(style.columnWidth());
     case CSSPropertyWebkitFilter:
         return AnimatableFilterOperations::create(style.filter());
     case CSSPropertyWebkitMaskBoxImageOutset:
         return createFromBorderImageLengthBox(style.maskBoxImageOutset(), style);
     case CSSPropertyWebkitMaskBoxImageSlice:
         return createFromLengthBoxAndBool(style.maskBoxImageSlices(), style.maskBoxImageSlicesFill(), style);
     case CSSPropertyWebkitMaskBoxImageSource:
         return createFromStyleImage(style.maskBoxImageSource());
     case CSSPropertyWebkitMaskBoxImageWidth:
@@ skipping 64 matching lines @@
         return createFromLength(style.svgStyle().ry(), style);
     case CSSPropertyZIndex:
         return createFromDouble(style.zIndex());
     default:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
 } // namespace blink