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

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

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGImage.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGImage.cpp b/third_party/WebKit/Source/core/layout/svg/LayoutSVGImage.cpp
index 91867b267e3846e7871142f9b3e0af1f11131e9a..3d14a4dc6f61811bfd17dfd5bc3711cb26663c7d 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGImage.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGImage.cpp
@@ -66,11 +66,12 @@ void LayoutSVGImage::updateBoundingBox()
     FloatRect oldBoundaries = m_objectBoundingBox;
 
     SVGLengthContext lengthContext(element());
+    LayoutSize intrinsicSize = m_imageResource->imageSize(style()->effectiveZoom());

[fs, 2016/08/11 15:52:57]

Probably needs to refine this a bit. (The end of)
SVGImagePainter::computeImageViewportSize can probably serve as a reference.

[Shanmuga Pandi, 2016/08/16 10:24:57]

Done.

     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() ? intrinsicSize.width().toFloat() : lengthContext.valueForLength(styleRef().width(), styleRef(), SVGLengthMode::Width),
+        styleRef().height().isAuto() ? intrinsicSize.height().toFloat() : lengthContext.valueForLength(styleRef().height(), styleRef(), SVGLengthMode::Height));
     m_needsBoundariesUpdate |= oldBoundaries != m_objectBoundingBox;
 }