Make DocumentResource to be a subclass of TextResource

third_party/WebKit/Source/core/fetch/DocumentResource.cpp

 /*
     Copyright (C) 2010 Rob Buis <rwlbuis@gmail.com>
     Copyright (C) 2011 Cosmin Truta <ctruta@gmail.com>
     Copyright (C) 2012 University of Szeged
     Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
@@ skipping 20 matching lines @@
 namespace blink {
 
 DocumentResource* DocumentResource::fetchSVGDocument(FetchRequest& request, ResourceFetcher* fetcher)
 {
     ASSERT(request.resourceRequest().frameType() == WebURLRequest::FrameTypeNone);
     request.mutableResourceRequest().setRequestContext(WebURLRequest::RequestContextImage);
     return toDocumentResource(fetcher->requestResource(request, SVGDocumentResourceFactory()));
 }
 
 DocumentResource::DocumentResource(const ResourceRequest& request, Type type, const ResourceLoaderOptions& options)
-    : Resource(request, type, options)
-    , m_decoder(TextResourceDecoder::create("application/xml"))
+    : TextResource(request, type, options, "application/xml", String())
 {
     // FIXME: We'll support more types to support HTMLImports.
     ASSERT(type == SVGDocument);
 }
 
 DocumentResource::~DocumentResource()
 {
 }
 
 DEFINE_TRACE(DocumentResource)
 {
     visitor->trace(m_document);
     Resource::trace(visitor);
 }
 
-void DocumentResource::setEncoding(const String& chs)
-{
-    m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);
-}
-
-String DocumentResource::encoding() const
-{
-    return m_decoder->encoding().name();
-}
-
 void DocumentResource::checkNotify()
 {
     if (m_data && mimeTypeAllowed()) {
-        StringBuilder decodedText;
-        decodedText.append(m_decoder->decode(m_data->data(), m_data->size()));
-        decodedText.append(m_decoder->flush());
         // We don't need to create a new frame because the new document belongs to the parent UseElement.
         m_document = createDocument(response().url());
-        m_document->setContent(decodedText.toString());
+        m_document->setContent(decodedText());
     }
     Resource::checkNotify();
 }
 
 bool DocumentResource::mimeTypeAllowed() const
 {
     ASSERT(getType() == SVGDocument);
     AtomicString mimeType = response().mimeType();
     if (response().isHTTP())
         mimeType = httpContentType();
     return mimeType == "image/svg+xml"
         || mimeType == "text/xml"
         || mimeType == "application/xml"
         || mimeType == "application/xhtml+xml";
 }
 
 Document* DocumentResource::createDocument(const KURL& url)
 {
     switch (getType()) {
     case SVGDocument:
         return XMLDocument::createSVG(DocumentInit(url));
     default:
         // FIXME: We'll add more types to support HTMLImports.
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
 } // namespace blink