CSS: Translate support for none.

third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  *     * 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
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 1188 matching lines @@
   for (auto& snapCoordinate : valueList) {
     coordinates.uncheckedAppend(convertPosition(state, *snapCoordinate));
   }
 
   return coordinates;
 }
 
 PassRefPtr<TranslateTransformOperation> StyleBuilderConverter::convertTranslate(
     StyleResolverState& state,
     const CSSValue& value) {
+  if (value.isIdentifierValue()) {
+    DCHECK_EQ(toCSSIdentifierValue(value).getValueID(), CSSValueNone);
+    return nullptr;
+  }
   const CSSValueList& list = toCSSValueList(value);
   ASSERT(list.length() <= 3);
   Length tx = convertLength(state, list.item(0));
   Length ty(0, Fixed);
   double tz = 0;
   if (list.length() >= 2)
     ty = convertLength(state, list.item(1));
   if (list.length() == 3)
     tz = toCSSPrimitiveValue(list.item(2))
              .computeLength<double>(state.cssToLengthConversionData());
@@ skipping 101 matching lines @@
 }
 
 const CSSValue& StyleBuilderConverter::convertRegisteredPropertyValue(
     const StyleResolverState& state,
     const CSSValue& value) {
   return computeRegisteredPropertyValue(state.cssToLengthConversionData(),
                                         value);
 }
 
 }  // namespace blink