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

third_party/WebKit/Source/core/css/cssom/CSSTranslation.h

 // 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.
 
 #ifndef CSSTranslation_h
 #define CSSTranslation_h
 
 #include "core/css/cssom/CSSLengthValue.h"
 #include "core/css/cssom/TransformComponent.h"
 
 namespace blink {
 
 class ExceptionState;
 
 class CORE_EXPORT CSSTranslation final : public TransformComponent {
     WTF_MAKE_NONCOPYABLE(CSSTranslation);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static CSSTranslation* create(CSSLengthValue* x, CSSLengthValue* y, ExceptionState&)
     {
+        return CSSTranslation::create(x, y);
+    }
+    static CSSTranslation* create(CSSLengthValue* x, CSSLengthValue* y)
+    {
         return new CSSTranslation(x, y, nullptr);
     }
     static CSSTranslation* create(CSSLengthValue* x, CSSLengthValue* y, CSSLengthValue* z, ExceptionState&);
 
-    static CSSTranslation* fromCSSValue(const CSSValue& value) { return nullptr; }
+    static CSSTranslation* fromCSSValue(const CSSValue& value);
 
     CSSLengthValue* x() const { return m_x; }
     CSSLengthValue* y() const { return m_y; }
     CSSLengthValue* z() const { return m_z; }
 
     TransformComponentType type() const override { return is2D() ? TranslationType : Translation3DType; }
 
     // TODO: Implement asMatrix for CSSTranslation.
     CSSMatrixTransformComponent* asMatrix() const override { return nullptr; }
 
@@ skipping 18 matching lines @@
     bool is2D() const { return !m_z; }
 
     Member<CSSLengthValue> m_x;
     Member<CSSLengthValue> m_y;
     Member<CSSLengthValue> m_z;
 };
 
 } // namespace blink
 
 #endif