Split out CSSPrimitiveValue's PropertyID into CSSCustomIdentValue

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

 // Copyright 2015 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 "config.h"
 #include "core/css/CSSCustomIdentValue.h"
 
 #include "core/css/CSSMarkup.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 CSSCustomIdentValue::CSSCustomIdentValue(const String& str)
     : CSSValue(CustomIdentClass)
-    , m_string(str) { }
+    , m_string(str)
+    , m_propertyId(CSSPropertyInvalid) { }
+
+CSSCustomIdentValue::CSSCustomIdentValue(CSSPropertyID id)
+    : CSSValue(CustomIdentClass)
+    , m_string()
+    , m_propertyId(id)
+{
+    ASSERT(isKnownPropertyID());
+}
+
 
 String CSSCustomIdentValue::customCSSText() const
 {
+    if (isKnownPropertyID())
+        return getPropertyNameAtomicString(m_propertyId);
     return quoteCSSStringIfNeeded(m_string);
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(CSSCustomIdentValue)
 {
     CSSValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink