Moved text decoding to the parser thread

Source/core/loader/DocumentWriter.cpp

Index: Source/core/loader/DocumentWriter.cpp
diff --git a/Source/core/loader/DocumentWriter.cpp b/Source/core/loader/DocumentWriter.cpp
index 9767ca8078e952b51d34f8a2653cd7803c65df60..a21b12f4deb9e71f4b4a4ce64ff0d20a18cc0f69 100644
--- a/Source/core/loader/DocumentWriter.cpp
+++ b/Source/core/loader/DocumentWriter.cpp
@@ -78,7 +78,6 @@ void DocumentWriter::appendReplacingData(const String& source)
         // Because we're pinned to the main thread we don't need to worry about
         // passing ownership of the source string.
         parser->append(source.impl());
-        parser->setHasAppendedData();
     }
 }