Moved text decoding to the parser thread

Source/core/html/parser/HTMLMetaCharsetParser.cpp

Index: Source/core/html/parser/HTMLMetaCharsetParser.cpp
diff --git a/Source/core/html/parser/HTMLMetaCharsetParser.cpp b/Source/core/html/parser/HTMLMetaCharsetParser.cpp
index 7f3c34d8905f201df53691c8e553ecde81550871..7b0524513381cfc6d84b82cb0cda55a198823d89 100644
--- a/Source/core/html/parser/HTMLMetaCharsetParser.cpp
+++ b/Source/core/html/parser/HTMLMetaCharsetParser.cpp
@@ -106,7 +106,7 @@ bool HTMLMetaCharsetParser::processMeta()
     const HTMLToken::AttributeList& tokenAttributes = m_token.attributes();
     AttributeList attributes;
     for (HTMLToken::AttributeList::const_iterator iter = tokenAttributes.begin(); iter != tokenAttributes.end(); ++iter) {
-        String attributeName = StringImpl::create8BitIfPossible(iter->name);
+        HTMLIdentifier attributeName(iter->name, Likely8Bit);
         String attributeValue = StringImpl::create8BitIfPossible(iter->value);
         attributes.append(std::make_pair(attributeName, attributeValue));
     }
@@ -122,17 +122,17 @@ WTF::TextEncoding HTMLMetaCharsetParser::encodingFromMetaAttributes(const Attrib
     String charset;
 
     for (AttributeList::const_iterator iter = attributes.begin(); iter != attributes.end(); ++iter) {
-        const AtomicString& attributeName = iter->first;
+        const HTMLIdentifier& attributeName = iter->first;
         const String& attributeValue = iter->second;
 
-        if (attributeName == http_equivAttr) {
+        if (threadSafeMatch(attributeName, http_equivAttr)) {
             if (equalIgnoringCase(attributeValue, "content-type"))
                 gotPragma = true;
         } else if (charset.isEmpty()) {
-            if (attributeName == charsetAttr) {
+            if (threadSafeMatch(attributeName, charsetAttr)) {
                 charset = attributeValue;
                 mode = Charset;
-            } else if (attributeName == contentAttr) {
+            } else if (threadSafeMatch(attributeName, contentAttr)) {
                 charset = extractCharset(attributeValue);
                 if (charset.length())
                     mode = Pragma;
@@ -178,7 +178,7 @@ bool HTMLMetaCharsetParser::checkForMetaCharset(const char* data, size_t length)
     while (m_tokenizer->nextToken(m_input, m_token)) {
         bool end = m_token.type() == HTMLToken::EndTag;
         if (end || m_token.type() == HTMLToken::StartTag) {
-            AtomicString tagName(m_token.name());
+            HTMLIdentifier tagName(m_token.name(), Likely8Bit);
             if (!end) {
                 m_tokenizer->updateStateFor(tagName);
                 if (tagName == metaTag && processMeta()) {