Support createImageBitmap from a SVG image

third_party/WebKit/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 150 matching lines @@
 static float resolveWidthForRatio(float height, const FloatSize& intrinsicRatio)
 {
     return height * intrinsicRatio.width() / intrinsicRatio.height();
 }
 
 static float resolveHeightForRatio(float width, const FloatSize& intrinsicRatio)
 {
     return width * intrinsicRatio.height() / intrinsicRatio.width();
 }
 
+bool SVGImage::hasIntrinsicSize()
+{
+    SVGSVGElement* svg = svgRootElement(m_page.get());
+    if (!svg)
+        return false;
+
+    LayoutSVGRoot* layoutObject = toLayoutSVGRoot(svg->layoutObject());
+    if (!layoutObject)
+        return false;
+
+    LayoutReplaced::IntrinsicSizingInfo intrinsicSizingInfo;
+    layoutObject->computeIntrinsicSizingInfo(intrinsicSizingInfo);
+
+    if (intrinsicSizingInfo.hasWidth && intrinsicSizingInfo.hasHeight)
+        return true;
+    return false;
+}
+
 FloatSize SVGImage::concreteObjectSize(const FloatSize& defaultObjectSize) const
 {
     SVGSVGElement* svg = svgRootElement(m_page.get());
     if (!svg)
         return FloatSize();
 
     LayoutSVGRoot* layoutObject = toLayoutSVGRoot(svg->layoutObject());
     if (!layoutObject)
         return FloatSize();
 
@@ skipping 355 matching lines @@
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 } // namespace blink