[WIP] Add support for CSSValue-> CSSLengthValue and CSSTranslation

third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/cssom/StyleValueFactory.h"
 
 #include "core/css/CSSValue.h"
-#include "core/css/cssom/CSSSimpleLength.h"
+#include "core/css/cssom/CSSLengthValue.h"
 #include "core/css/cssom/CSSStyleValue.h"
 #include "core/css/cssom/TransformValue.h"
 
 namespace blink {
 
 CSSStyleValueVector StyleValueFactory::cssValueToStyleValueVector(CSSPropertyID propertyID, const CSSValue& value)
 {
     CSSStyleValueVector styleValueVector;
 
     if (value.isPrimitiveValue()) {
         const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(value);
-        if (primitiveValue.isLength() && !primitiveValue.isCalculated()) {
-            styleValueVector.append(CSSSimpleLength::create(primitiveValue.getDoubleValue(), primitiveValue.typeWithCalcResolved()));
+        if (primitiveValue.isLength()) {
+            styleValueVector.append(CSSLengthValue::fromCSSValue(value));
             return styleValueVector;
         }
     }
 
     switch (propertyID) {
     case CSSPropertyTransform:
         styleValueVector.append(TransformValue::fromCSSValue(value));
         break;
     default:
         // TODO(meade): Implement the rest.
         break;
     }
     return styleValueVector;
 }
 
+CSSStyleValue* StyleValueFactory::cssValueToSingleStyleValue(CSSPropertyID propertyID, const CSSValue& value)
+{
+    CSSStyleValueVector styleValueVector = StyleValueFactory::cssValueToStyleValueVector(propertyID, value);
+    if (styleValueVector.size() != 1)
+        return nullptr;
+
+    return styleValueVector[0];
+}
+
 } // namespace blink