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

third_party/WebKit/Source/core/css/CSSCalculationValue.cpp

Index: third_party/WebKit/Source/core/css/CSSCalculationValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSCalculationValue.cpp b/third_party/WebKit/Source/core/css/CSSCalculationValue.cpp
index b1de7219ff9af28f94b857a8c11157c4d59ecd18..8e425573158800866a2f15667d0ec60cce67a52d 100644
--- a/third_party/WebKit/Source/core/css/CSSCalculationValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSCalculationValue.cpp
@@ -259,6 +259,20 @@ public:
         return m_value->typeWithCalcResolved();
     }
 
+    const CSSCalcExpressionNode* getLHS() const
+    {
+        return nullptr;
+    }
+
+    const CSSCalcExpressionNode* getRHS() const
+    {
+        return nullptr;
+    }
+
+    CalcOperator op() const
+    {
+        return CalcAdd;
+    }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
@@ -494,6 +508,21 @@ public:
 
     Type getType() const override { return CssCalcBinaryOperation; }
 
+    const CSSCalcExpressionNode* getLHS() const
+    {
+        return m_leftSide;
+    }
+
+    const CSSCalcExpressionNode* getRHS() const
+    {
+        return m_rightSide;
+    }
+
+    CalcOperator op() const
+    {
+        return m_operator;
+    }
+
     CSSPrimitiveValue::UnitType typeWithCalcResolved() const override
     {
         switch (m_category) {