Don't expose DocumentWriter to embedding layer

Source/core/svg/graphics/SVGImage.cpp

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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.
@@ skipping 13 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "core/svg/graphics/SVGImage.h"
 
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/shadow/ComposedTreeWalker.h"
-#include "core/loader/DocumentLoader.h"
+#include "core/loader/FrameLoadRequest.h"
 #include "core/page/Chrome.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/rendering/style/RenderStyle.h"
 #include "core/rendering/svg/RenderSVGRoot.h"
 #include "core/svg/SVGDocument.h"
 #include "core/svg/SVGFEImageElement.h"
 #include "core/svg/SVGImageElement.h"
 #include "core/svg/SVGSVGElement.h"
@@ skipping 347 matching lines @@
         RefPtr<Frame> frame = Frame::create(FrameInit::create(0, &m_page->frameHost(), dummyFrameLoaderClient));
         frame->setView(FrameView::create(frame.get()));
         frame->init();
         FrameLoader& loader = frame->loader();
         loader.forceSandboxFlags(SandboxAll);
 
         frame->view()->setScrollbarsSuppressed(true);
         frame->view()->setCanHaveScrollbars(false); // SVG Images will always synthesize a viewBox, if it's not available, and thus never see scrollbars.
         frame->view()->setTransparent(true); // SVG Images are transparent.
 
-        ASSERT(loader.documentLoader()); // DocumentLoader should have been created by frame->init().
-        DocumentWriter* writer = loader.documentLoader()->beginWriting("image/svg+xml", "UTF-8");
-        writer->addData(data()->data(), data()->size());
-        loader.documentLoader()->endWriting(writer);
+        loader.load(FrameLoadRequest(0, blankURL(), SubstituteData(data(), "image/svg+xml", "UTF-8", KURL(), ForceSynchronousLoad)));
         // Set the intrinsic size before a container size is available.
         m_intrinsicSize = containerSize();
     }
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 }