Revert "Moved text decoding to the parser thread"

Source/core/html/parser/HTMLParserIdioms.h

Index: Source/core/html/parser/HTMLParserIdioms.h
diff --git a/Source/core/html/parser/HTMLParserIdioms.h b/Source/core/html/parser/HTMLParserIdioms.h
index 49dbed3ba6c6639e80eff7daa5847e36dc3b8b1c..16fd3eebe3cb808dd0252c35a69add4e9e9fb905 100644
--- a/Source/core/html/parser/HTMLParserIdioms.h
+++ b/Source/core/html/parser/HTMLParserIdioms.h
@@ -30,10 +30,6 @@
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
-namespace WTF {
-class TextEncoding;
-}
-
 namespace WebCore {
 
 // Space characters as defined by the HTML specification.
@@ -65,10 +61,6 @@ bool parseHTMLInteger(const String&, int&);
 // http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers
 bool parseHTMLNonNegativeInteger(const String&, unsigned int&);
 
-typedef Vector<pair<String, String> > HTMLAttributeList;
-// The returned encoding might not be valid.
-WTF::TextEncoding encodingFromMetaAttributes(const HTMLAttributeList&);
-
 // Inline implementations of some of the functions declared above.
 
 template<typename CharType>