Moved text decoding to the parser thread

Source/core/dom/DocumentEncodingData.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
         : wasDetectedHeuristically(false)
         , sawDecodingError(false)
     {
     }
 
     WTF::TextEncoding encoding;
     bool wasDetectedHeuristically;
     bool sawDecodingError;
 };
 
+inline bool operator!=(const DocumentEncodingData& a, const DocumentEncodingData& b)
+{
+    return a.encoding != b.encoding
+        || a.wasDetectedHeuristically != b.wasDetectedHeuristically
+        || a.sawDecodingError != b.sawDecodingError;
+}
+
 } // namespace WebCore
 
 #endif // DocumentEncodingData_h