Revert "CSS Custom Properties (Variables)"

third_party/WebKit/Source/core/css/parser/CSSParserToken.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSParserToken.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserToken.cpp b/third_party/WebKit/Source/core/css/parser/CSSParserToken.cpp
index b131a9422da3f2bc4c8bf790527089e05a4acc3e..e383267dabb612cab17b747dc75707069aee4326 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserToken.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserToken.cpp
@@ -129,25 +129,6 @@ CSSValueID CSSParserToken::functionId() const
     return static_cast<CSSValueID>(m_id);
 }
 
-bool CSSParserToken::hasStringBacking() const
-{
-    CSSParserTokenType tokenType = type();
-    return tokenType == IdentToken
-        || tokenType == FunctionToken
-        || tokenType == AtKeywordToken
-        || tokenType == HashToken
-        || tokenType == UrlToken
-        || tokenType == DimensionToken
-        || tokenType == StringToken;
-}
-
-CSSParserToken CSSParserToken::copyWithUpdatedString(const CSSParserString& parserString) const
-{
-    CSSParserToken copy(*this);
-    copy.initValueFromCSSParserString(parserString);
-    return copy;
-}
-
 void CSSParserToken::serialize(StringBuilder& builder) const
 {
     // This is currently only used for @supports CSSOM. To keep our implementation