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

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

Index: third_party/WebKit/Source/core/css/cssom/CSSCalcLength.h
diff --git a/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.h b/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.h
index 6fef39295be5ecc6af26aceec39164e7ecf91fab..7fafde2079ebf22e398b7229afe2a3f4feaa0967 100644
--- a/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.h
+++ b/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.h
@@ -5,6 +5,7 @@
 #ifndef CSSCalcLength_h
 #define CSSCalcLength_h
 
+#include "core/css/CSSCalculationValue.h"
 #include "core/css/cssom/CSSLengthValue.h"
 #include "wtf/BitVector.h"
 
@@ -12,17 +13,21 @@ namespace blink {
 
 class CalcDictionary;
 class CSSSimpleLength;
+class CSSValue;
 
 class CORE_EXPORT CSSCalcLength final : public CSSLengthValue {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static CSSCalcLength* create(const CSSLengthValue*);
+    static CSSCalcLength* create(const CalcDictionary&);
     static CSSCalcLength* create(const CalcDictionary&, ExceptionState&);
     static CSSCalcLength* create(const CSSLengthValue* length, ExceptionState&)
     {
         return create(length);
     }
 
+    static CSSCalcLength* fromCSSValue(const CSSValue&);
+
 #define GETTER_MACRO(name, type) \
     double name(bool& isNull) \
     { \
@@ -56,14 +61,16 @@ public:
 protected:
     CSSLengthValue* addInternal(const CSSLengthValue* other, ExceptionState&) override;
     CSSLengthValue* subtractInternal(const CSSLengthValue* other, ExceptionState&) override;
-    CSSLengthValue* multiplyInternal(double, ExceptionState&) override;
-    CSSLengthValue* divideInternal(double, ExceptionState&) override;
+    CSSLengthValue* multiplyInternal(double) override;
+    CSSLengthValue* divideInternal(double) override;
 
 private:
     CSSCalcLength();
     CSSCalcLength(const CSSCalcLength& other);
     CSSCalcLength(const CSSSimpleLength& other);
 
+    static CSSCalcLength* populateCalcLengthFromExpressionNode(const CSSCalcExpressionNode*);    
+
     static int indexForUnit(CSSPrimitiveValue::UnitType);
     static CSSPrimitiveValue::UnitType unitFromIndex(int index)
     {