Unprefix -webkit-filter and add a pixel test for it.

sky/engine/core/css/resolver/AnimatedStyleBuilder.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 425 matching lines @@
         return;
     case CSSPropertyWebkitBorderHorizontalSpacing:
         style->setHorizontalBorderSpacing(animatableValueRoundClampTo<unsigned short>(value));
         return;
     case CSSPropertyWebkitBorderVerticalSpacing:
         style->setVerticalBorderSpacing(animatableValueRoundClampTo<unsigned short>(value));
         return;
     case CSSPropertyWebkitClipPath:
         style->setClipPath(toAnimatableClipPathOperation(value)->clipPathOperation());
         return;
-    case CSSPropertyWebkitFilter:
+    case CSSPropertyFilter:
         style->setFilter(toAnimatableFilterOperations(value)->operations());
         return;
     case CSSPropertyWebkitMaskBoxImageOutset:
         style->setMaskBoxImageOutset(animatableValueToBorderImageLengthBox(value, state));
         return;
     case CSSPropertyWebkitMaskBoxImageSlice:
         style->setMaskBoxImageSlices(animatableValueToLengthBox(toAnimatableLengthBoxAndBool(value)->box(), state, ValueRangeNonNegative));
         style->setMaskBoxImageSlicesFill(toAnimatableLengthBoxAndBool(value)->flag());
         return;
     case CSSPropertyWebkitMaskBoxImageSource:
@@ skipping 53 matching lines @@
         return;
     case CSSPropertyZIndex:
         style->setZIndex(animatableValueRoundClampTo<int>(value));
         return;
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink