SVG Image intrinsic size should be used if css style size is 'auto'

third_party/WebKit/Source/core/layout/svg/LayoutSVGRect.cpp

 /*
  * Copyright (C) 2011 University of Szeged
  * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
  * 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 36 matching lines @@
     // Before creating a new object we need to clear the cached bounding box
     // to avoid using garbage.
     m_fillBoundingBox = FloatRect();
     m_strokeBoundingBox = FloatRect();
     m_usePathFallback = false;
     SVGRectElement* rect = toSVGRectElement(element());
     ASSERT(rect);
 
     SVGLengthContext lengthContext(rect);
     FloatSize boundingBoxSize(
-        lengthContext.valueForLength(styleRef().width(), styleRef(), SVGLengthMode::Width),
-        lengthContext.valueForLength(styleRef().height(), styleRef(), SVGLengthMode::Height));
+        styleRef().width().isAuto() ? rect->width()->currentValue()->value(lengthContext) : lengthContext.valueForLength(styleRef().width(), styleRef(), SVGLengthMode::Width),

[fs, 2016/08/10 18:01:34]

I'd suggest to leave this alone for now. (Not sure what makes sense here in
practice.)

[Shanmuga Pandi, 2016/08/11 05:54:20]

Acknowledged.

+        styleRef().height().isAuto() ? rect->height()->currentValue()->value(lengthContext) : lengthContext.valueForLength(styleRef().height(), styleRef(), SVGLengthMode::Height));
 
     // Spec: "A negative value is an error."
     if (boundingBoxSize.width() < 0 || boundingBoxSize.height() < 0)
         return;
 
     // Spec: "A value of zero disables rendering of the element."
     if (!boundingBoxSize.isEmpty()) {
         // Fallback to LayoutSVGShape and path-based hit detection if the rect
         // has rounded corners or a non-scaling or non-simple stroke.
         if (lengthContext.valueForLength(styleRef().svgStyle().rx(), styleRef(), SVGLengthMode::Width) > 0
@@ skipping 68 matching lines @@
     // An approximation of sqrt(2) is used here because at certain precise
     // miterlimits, the join style used might not be correct (e.g. a miterlimit
     // of 1.4142135 should result in bevel joins, but may be drawn using miter
     // joins).
     return svgStyle.strokeDashArray()->isEmpty()
         && svgStyle.joinStyle() == MiterJoin
         && svgStyle.strokeMiterLimit() >= 1.5;
 }
 
 } // namespace blink