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

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

 /*
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 48 matching lines @@
     ImageQualityController::remove(*this);
     m_imageResource->shutdown();
     LayoutSVGModelObject::willBeDestroyed();
 }
 
 void LayoutSVGImage::updateBoundingBox()
 {
     FloatRect oldBoundaries = m_objectBoundingBox;
 
     SVGLengthContext lengthContext(element());
+    SVGImageElement* image = toSVGImageElement(element());
     m_objectBoundingBox = FloatRect(
         lengthContext.valueForLength(styleRef().svgStyle().x(), styleRef(), SVGLengthMode::Width),
         lengthContext.valueForLength(styleRef().svgStyle().y(), styleRef(), SVGLengthMode::Height),
-        lengthContext.valueForLength(styleRef().width(), styleRef(), SVGLengthMode::Width),
-        lengthContext.valueForLength(styleRef().height(), styleRef(), SVGLengthMode::Height));
+        styleRef().width().isAuto() ? image->width()->currentValue()->value(lengthContext) : lengthContext.valueForLength(styleRef().width(), styleRef(), SVGLengthMode::Width),

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

No, this is not what should happen. To quote the relevant suggestion from the
bug: "...I think 'auto' should mean use the intrinsic width of the referenced
image." Notice that last part. So if we have an <image> referencing a bitmap
with dimensions 1024x768, then 'width: auto' would mean a used value of '1024'
(and similarly '768' for height.) I'm not sure if anything in particular should
be done for when SVG images are referenced - maybe, maybe not.

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

Thank you fs@ for explaining in detail.
Done the changes.

+        styleRef().height().isAuto() ? image->height()->currentValue()->value(lengthContext) : lengthContext.valueForLength(styleRef().height(), styleRef(), SVGLengthMode::Height));
     m_needsBoundariesUpdate |= oldBoundaries != m_objectBoundingBox;
 }
 
 void LayoutSVGImage::layout()
 {
     ASSERT(needsLayout());
     LayoutAnalyzer::Scope analyzer(*this);
 
     // Invalidate all resources of this client if our layout changed.
     if (everHadLayout() && selfNeedsLayout())
@@ skipping 65 matching lines @@
     setShouldDoFullPaintInvalidation();
 }
 
 void LayoutSVGImage::addOutlineRects(Vector<LayoutRect>& rects, const LayoutPoint&, IncludeBlockVisualOverflowOrNot) const
 {
     // this is called from paint() after the localTransform has already been applied
     rects.append(LayoutRect(paintInvalidationRectInLocalSVGCoordinates()));
 }
 
 } // namespace blink