CSS: Scale 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 1229 matching lines @@
 PassRefPtr<RotateTransformOperation> StyleBuilderConverter::convertRotate(
     StyleResolverState& state,
     const CSSValue& value) {
   return RotateTransformOperation::create(convertRotation(value),
                                           TransformOperation::Rotate3D);
 }
 
 PassRefPtr<ScaleTransformOperation> StyleBuilderConverter::convertScale(
     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);
   double sx = toCSSPrimitiveValue(list.item(0)).getDoubleValue();
   double sy = 1;
   double sz = 1;
   if (list.length() >= 2)
     sy = toCSSPrimitiveValue(list.item(1)).getDoubleValue();
   if (list.length() == 3)
     sz = toCSSPrimitiveValue(list.item(2)).getDoubleValue();
 
@@ skipping 39 matching lines @@
       // Instead of the actual zoom, use 1 to avoid potential rounding errors
       Length length = primitiveValue.convertToLength(
           state.cssToLengthConversionData().copyWithAdjustedZoom(1));
       return *CSSPrimitiveValue::create(length, 1);
     }
   }
   return value;
 }
 
 }  // namespace blink