Moved text decoding to the parser thread

Source/core/fetch/TextResourceDecoder.cpp

Index: Source/core/fetch/TextResourceDecoder.cpp
diff --git a/Source/core/fetch/TextResourceDecoder.cpp b/Source/core/fetch/TextResourceDecoder.cpp
index df1279d7552e563f72aa78be3b9a54a1034c9c2a..3acbb2ac7113e42afbbbfc1d6200da0c0f68c840 100644
--- a/Source/core/fetch/TextResourceDecoder.cpp
+++ b/Source/core/fetch/TextResourceDecoder.cpp
@@ -435,4 +435,11 @@ String TextResourceDecoder::flush()
     return result;
 }
 
+void TextResourceDecoder::getEncodingData(DocumentEncodingData& encodingData) const
+{
+    encodingData.encoding = m_encoding;
+    encodingData.wasDetectedHeuristically = encodingWasDetectedHeuristically();
+    encodingData.sawDecodingError = m_sawError;
+}
+
 }