Revert of Moved text decoding to the parser thread

Source/core/html/parser/HTMLParserIdioms.cpp

Index: Source/core/html/parser/HTMLParserIdioms.cpp
diff --git a/Source/core/html/parser/HTMLParserIdioms.cpp b/Source/core/html/parser/HTMLParserIdioms.cpp
index 5d24c6acf16ef6b361e52fcc446a452ca58fad8f..f538c54cc5bfc600db038025427f6b21559c110a 100644
--- a/Source/core/html/parser/HTMLParserIdioms.cpp
+++ b/Source/core/html/parser/HTMLParserIdioms.cpp
@@ -25,18 +25,14 @@
 #include "config.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 
-#include "HTMLNames.h"
 #include <limits>
 #include "wtf/MathExtras.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/StringHash.h"
-#include "wtf/text/TextEncoding.h"
 
 namespace WebCore {
 
-using namespace HTMLNames;
-
 template <typename CharType>
 static String stripLeadingAndTrailingHTMLSpaces(String string, const CharType* characters, unsigned length)
 {
@@ -269,92 +265,6 @@ bool parseHTMLNonNegativeInteger(const String& input, unsigned& value)
     return parseHTMLNonNegativeIntegerInternal(start, start + length, value);
 }
 
-static const char charsetString[] = "charset";
-static const size_t charsetLength = sizeof("charset") - 1;
-
-String extractCharset(const String& value)
-{
-    size_t pos = 0;
-    unsigned length = value.length();
-
-    while (pos < length) {
-        pos = value.find(charsetString, pos, false);
-        if (pos == kNotFound)
-            break;
-
-        pos += charsetLength;
-
-        // Skip whitespace.
-        while (pos < length && value[pos] <= ' ')
-            ++pos;
-
-        if (value[pos] != '=')
-            continue;
-
-        ++pos;
-
-        while (pos < length && value[pos] <= ' ')
-            ++pos;
-
-        char quoteMark = 0;
-        if (pos < length && (value[pos] == '"' || value[pos] == '\'')) {
-            quoteMark = static_cast<char>(value[pos++]);
-            ASSERT(!(quoteMark & 0x80));
-        }
-
-        if (pos == length)
-            break;
-
-        unsigned end = pos;
-        while (end < length && ((quoteMark && value[end] != quoteMark) || (!quoteMark && value[end] > ' ' && value[end] != '"' && value[end] != '\'' && value[end] != ';')))
-            ++end;
-
-        if (quoteMark && (end == length))
-            break; // Close quote not found.
-
-        return value.substring(pos, end - pos);
-    }
-
-    return "";
-}
-
-enum Mode {
-    None,
-    Charset,
-    Pragma,
-};
-
-WTF::TextEncoding encodingFromMetaAttributes(const HTMLAttributeList& attributes)
-{
-    bool gotPragma = false;
-    Mode mode = None;
-    String charset;
-
-    for (HTMLAttributeList::const_iterator iter = attributes.begin(); iter != attributes.end(); ++iter) {
-        const String& attributeName = iter->first;
-        const String& attributeValue = iter->second;
-
-        if (threadSafeMatch(attributeName, http_equivAttr)) {
-            if (equalIgnoringCase(attributeValue, "content-type"))
-                gotPragma = true;
-        } else if (charset.isEmpty()) {
-            if (threadSafeMatch(attributeName, charsetAttr)) {
-                charset = attributeValue;
-                mode = Charset;
-            } else if (threadSafeMatch(attributeName, contentAttr)) {
-                charset = extractCharset(attributeValue);
-                if (charset.length())
-                    mode = Pragma;
-            }
-        }
-    }
-
-    if (mode == Charset || (mode == Pragma && gotPragma))
-        return WTF::TextEncoding(stripLeadingAndTrailingHTMLSpaces(charset));
-
-    return WTF::TextEncoding();
-}
-
 static bool threadSafeEqual(const StringImpl* a, const StringImpl* b)
 {
     if (a == b)