Use ASCII case-insensitive matching for ident-likes in the CSS parser

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

Index: third_party/WebKit/Source/core/css/parser/MediaQueryParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/MediaQueryParser.cpp b/third_party/WebKit/Source/core/css/parser/MediaQueryParser.cpp
index 8df06e3a233b12a35a740a4132367719b4c84b91..cfb23db101b7164092d71ca38ef46fb90ac6f4f4 100644
--- a/third_party/WebKit/Source/core/css/parser/MediaQueryParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/MediaQueryParser.cpp
@@ -65,19 +65,19 @@ void MediaQueryParser::readRestrictor(CSSParserTokenType type, const CSSParserTo
 
 void MediaQueryParser::readMediaNot(CSSParserTokenType type, const CSSParserToken& token)
 {
-    if (type == IdentToken && equalIgnoringCase(token.value(), "not"))
+    if (type == IdentToken && token.valueEqualsIgnoringASCIICase("not"))
         setStateAndRestrict(ReadFeatureStart, MediaQuery::Not);
     else
         readFeatureStart(type, token);
 }
 
-static bool isRestrictorOrLogicalOperator(const String& tokenValue)
+static bool isRestrictorOrLogicalOperator(const CSSParserToken& token)
 {
     // FIXME: it would be more efficient to use lower-case always for tokenValue.
-    return equalIgnoringCase(tokenValue, "not")
-        || equalIgnoringCase(tokenValue, "and")
-        || equalIgnoringCase(tokenValue, "or")
-        || equalIgnoringCase(tokenValue, "only");
+    return token.valueEqualsIgnoringASCIICase("not")
+        || token.valueEqualsIgnoringASCIICase("and")
+        || token.valueEqualsIgnoringASCIICase("or")
+        || token.valueEqualsIgnoringASCIICase("only");
 }
 
 void MediaQueryParser::readMediaType(CSSParserTokenType type, const CSSParserToken& token)
@@ -88,12 +88,12 @@ void MediaQueryParser::readMediaType(CSSParserTokenType type, const CSSParserTok
         else
             m_state = ReadFeature;
     } else if (type == IdentToken) {
-        if (m_state == ReadRestrictor && equalIgnoringCase(token.value(), "not")) {
+        if (m_state == ReadRestrictor && token.valueEqualsIgnoringASCIICase("not")) {
             setStateAndRestrict(ReadMediaType, MediaQuery::Not);
-        } else if (m_state == ReadRestrictor && equalIgnoringCase(token.value(), "only")) {
+        } else if (m_state == ReadRestrictor && token.valueEqualsIgnoringASCIICase("only")) {
             setStateAndRestrict(ReadMediaType, MediaQuery::Only);
         } else if (m_mediaQueryData.restrictor() != MediaQuery::None
-            && isRestrictorOrLogicalOperator(token.value())) {
+            && isRestrictorOrLogicalOperator(token)) {
             m_state = SkipUntilComma;
         } else {
             m_mediaQueryData.setMediaType(token.value());
@@ -110,7 +110,7 @@ void MediaQueryParser::readMediaType(CSSParserTokenType type, const CSSParserTok
 
 void MediaQueryParser::readAnd(CSSParserTokenType type, const CSSParserToken& token)
 {
-    if (type == IdentToken && equalIgnoringCase(token.value(), "and")) {
+    if (type == IdentToken && token.valueEqualsIgnoringASCIICase("and")) {
         m_state = ReadFeatureStart;
     } else if (type == CommaToken && m_parserType != MediaConditionParser) {
         m_querySet->addMediaQuery(m_mediaQueryData.takeMediaQuery());