Use AtomicString type more consistently for mimeType / encoding

Source/core/loader/DocumentWriter.cpp

 /*
  * Copyright (C) 2010. Adam Barth. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 26 matching lines @@
 #include "core/frame/DOMWindow.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
 #include "core/page/Settings.h"
 #include "platform/weborigin/KURL.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-PassRefPtr<DocumentWriter> DocumentWriter::create(Document* document, const String& mimeType, const String& encoding, bool encodingUserChoosen)
+PassRefPtr<DocumentWriter> DocumentWriter::create(Document* document, const AtomicString& mimeType, const AtomicString& encoding, bool encodingUserChoosen)
 {
     return adoptRef(new DocumentWriter(document, mimeType, encoding, encodingUserChoosen));
 }
 
-DocumentWriter::DocumentWriter(Document* document, const String& mimeType, const String& encoding, bool encodingUserChoosen)
+DocumentWriter::DocumentWriter(Document* document, const AtomicString& mimeType, const AtomicString& encoding, bool encodingUserChoosen)
     : m_document(document)
     , m_decoderBuilder(mimeType, encoding, encodingUserChoosen)
     // We grab a reference to the parser so that we'll always send data to the
     // original parser, even if the document acquires a new parser (e.g., via
     // document.open).
     , m_parser(m_document->implicitOpen())
 {
     if (m_document->frame()) {
         if (FrameView* view = m_document->frame()->view())
             view->setContentsSize(IntSize());
@@ skipping 66 matching lines @@
         decoder->setEncoding(charset, TextResourceDecoder::UserChosenEncoding);
 }
 
 void DocumentWriter::setDocumentWasLoadedAsPartOfNavigation()
 {
     ASSERT(m_parser && !m_parser->isStopped());
     m_parser->setDocumentWasLoadedAsPartOfNavigation();
 }
 
 } // namespace WebCore