Refactoring: Generalize CachedSVGDocument for non-SVG use.

Source/core/loader/cache/CachedSVGDocument.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.
-
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Library General Public License for more details.
-
-    You should have received a copy of the GNU Library General Public License
-    along with this library; see the file COPYING.LIB.  If not, write to
-    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-    Boston, MA 02110-1301, USA.
-*/
-
-#include "config.h"
-
-#include "core/loader/cache/CachedSVGDocument.h"
-
-#include "core/loader/cache/CachedResourceClient.h"
-#include "core/loader/cache/CachedResourceHandle.h"
-#include "core/platform/SharedBuffer.h"
-#include <wtf/text/StringBuilder.h>
-
-namespace WebCore {
-
-CachedSVGDocument::CachedSVGDocument(const ResourceRequest& request)
-    : CachedResource(request, SVGDocumentResource)
-    , m_decoder(TextResourceDecoder::create("application/xml"))
-{
-    setAccept("image/svg+xml");
-}
-
-CachedSVGDocument::~CachedSVGDocument()
-{
-}
-
-void CachedSVGDocument::setEncoding(const String& chs)
-{
-    m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);
-}
-
-String CachedSVGDocument::encoding() const
-{
-    return m_decoder->encoding().name();
-}
-
-void CachedSVGDocument::checkNotify()
-{
-    if (m_data) {
-        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 = SVGDocument::create(0, response().url());
-        m_document->setContent(decodedText.toString());
-    }
-    CachedResource::checkNotify();
-}
-
-void CachedSVGDocument::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
-{
-    MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CachedResourceSVG);
-    CachedResource::reportMemoryUsage(memoryObjectInfo);
-    info.addMember(m_document, "document");
-    info.addMember(m_decoder, "decoder");
-}
-
-}