Support animating CSS property "order"

third_party/WebKit/Source/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 531 matching lines @@
           animatableValueToLength(value, state, ValueRangeNonNegative));
       return;
     case CSSPropertyObjectPosition:
       style->setObjectPosition(animatableValueToLengthPoint(value, state));
       return;
     case CSSPropertyOpacity:
       // Avoiding a value of 1 forces a layer to be created.
       style->setOpacity(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0,
                                        nextafterf(1, 0)));
       return;
+    case CSSPropertyOrder:
+      style->setOrder(
+          clampTo<int>(round(toAnimatableDouble(value)->toDouble())));
+      return;
     case CSSPropertyOrphans:
       style->setOrphans(
           clampTo<short>(round(toAnimatableDouble(value)->toDouble()), 1));
       return;
     case CSSPropertyOutlineColor:
       style->setOutlineColor(toAnimatableColor(value)->getColor());
       style->setVisitedLinkOutlineColor(
           toAnimatableColor(value)->visitedLinkColor());
       return;
     case CSSPropertyOutlineOffset:
@@ skipping 299 matching lines @@
       style->setRy(
           animatableValueToLength(value, state, ValueRangeNonNegative));
       return;
 
     default:
       ASSERT_NOT_REACHED();
   }
 }
 
 }  // namespace blink