Disable accelerated compositing for SVGImage content layers.

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 323 matching lines @@
         // FIXME: If this SVG ends up loading itself, we might leak the world.
         // The Cache code does not know about CachedImages holding Frames and
         // won't know to break the cycle.
         // This will become an issue when SVGImage will be able to load other
         // SVGImage objects, but we're safe now, because SVGImage can only be
         // loaded by a top-level document.
         m_page = adoptPtr(new Page(pageClients));
         m_page->settings()->setMediaEnabled(false);
         m_page->settings()->setScriptEnabled(false);
         m_page->settings()->setPluginsEnabled(false);
+        m_page->settings()->setAcceleratedCompositingEnabled(false);
 
         RefPtr<Frame> frame = Frame::create(m_page.get(), 0, 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->activeDocumentLoader()); // DocumentLoader should have been created by frame->init().
         DocumentWriter* writer = loader->activeDocumentLoader()->beginWriting("image/svg+xml", "UTF-8");
         writer->addData(data()->data(), data()->size());
         loader->activeDocumentLoader()->endWriting(writer);
         // Set the intrinsic size before a container size is available.
         m_intrinsicSize = containerSize();
     }
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 }