Add support for the object-fit CSS property.

Source/core/loader/cache/CachedImage.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     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
@@ skipping 207 matching lines @@
 }
 
 bool CachedImage::imageHasRelativeHeight() const
 {
     if (m_image)
         return m_image->hasRelativeHeight();
 
     return false;
 }
 
-LayoutSize CachedImage::imageSizeForRenderer(const RenderObject* renderer, float multiplier)
+LayoutSize CachedImage::imageSizeForRenderer(const RenderObject* renderer, float multiplier, SizeType sizeType)
 {
     ASSERT(!isPurgeable());
 
     if (!m_image)
         return IntSize();
 
     LayoutSize imageSize;
 
     if (m_image->isBitmapImage() && (renderer && renderer->shouldRespectImageOrientation() == RespectImageOrientation))
         imageSize = static_cast<BitmapImage*>(m_image.get())->sizeRespectingOrientation();
-    else if (m_image->isSVGImage())
+    else if (m_image->isSVGImage() && sizeType == NormalSize)
         imageSize = m_svgImageCache->imageSizeForRenderer(renderer);
     else
         imageSize = m_image->size();
 
     if (multiplier == 1.0f)
         return imageSize;
 
     // Don't let images that have a width/height >= 1 shrink below 1 when zoomed.
     float widthScale = m_image->hasRelativeWidth() ? 1.0f : multiplier;
     float heightScale = m_image->hasRelativeHeight() ? 1.0f : multiplier;
@@ skipping 190 matching lines @@
 
 bool CachedImage::currentFrameKnownToBeOpaque(const RenderObject* renderer)
 {
     Image* image = imageForRenderer(renderer);
     if (image->isBitmapImage())
         image->nativeImageForCurrentFrame(); // force decode
     return image->currentFrameKnownToBeOpaque();
 }
 
 } // namespace WebCore