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

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

Index: third_party/WebKit/Source/core/css/cssom/CSSLengthValue.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/CSSLengthValue.cpp b/third_party/WebKit/Source/core/css/cssom/CSSLengthValue.cpp
index 7f08b13aa7464a32d6e698418b3b209bd1cb2aee..cbd38040557d09043d693327e72a6975c761a324 100644
--- a/third_party/WebKit/Source/core/css/cssom/CSSLengthValue.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/CSSLengthValue.cpp
@@ -13,6 +13,21 @@
 
 namespace blink {
 
+CSSLengthValue* CSSLengthValue::fromCSSValue(const CSSValue& value)
+{
+    if (!value.isPrimitiveValue())
+        return nullptr;
+
+    const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(value);
+    if (!primitiveValue.isLength())
+        return nullptr;
+
+    if (!primitiveValue.isCalculated())
+        return CSSSimpleLength::create(primitiveValue.getDoubleValue(), primitiveValue.typeWithCalcResolved());
+
+    return CSSCalcLength::fromCSSValue(value);
+}
+
 CSSPrimitiveValue::UnitType CSSLengthValue::unitFromName(const String& name)
 {
     if (equalIgnoringASCIICase(name, "percent") || name == "%") {
@@ -57,14 +72,14 @@ CSSLengthValue* CSSLengthValue::subtract(const CSSLengthValue* other, ExceptionS
     return result->subtract(other, exceptionState);
 }
 
-CSSLengthValue* CSSLengthValue::multiply(double x, ExceptionState& exceptionState)
+CSSLengthValue* CSSLengthValue::multiply(double x, ExceptionState&)
 {
-    return multiplyInternal(x, exceptionState);
+    return multiplyInternal(x);
 }
 
-CSSLengthValue* CSSLengthValue::divide(double x, ExceptionState& exceptionState)
+CSSLengthValue* CSSLengthValue::divide(double x, ExceptionState&)
 {
-    return divideInternal(x, exceptionState);
+    return divideInternal(x);
 }
 
 CSSLengthValue* CSSLengthValue::addInternal(const CSSLengthValue*, ExceptionState&)
@@ -79,13 +94,13 @@ CSSLengthValue* CSSLengthValue::subtractInternal(const CSSLengthValue*, Exceptio
     return nullptr;
 }
 
-CSSLengthValue* CSSLengthValue::multiplyInternal(double, ExceptionState&)
+CSSLengthValue* CSSLengthValue::multiplyInternal(double)
 {
     NOTREACHED();
     return nullptr;
 }
 
-CSSLengthValue* CSSLengthValue::divideInternal(double, ExceptionState&)
+CSSLengthValue* CSSLengthValue::divideInternal(double)
 {
     NOTREACHED();
     return nullptr;