[svg2] Make 'cx', 'cy' and 'r' presentation attributes

Source/core/css/LayoutStyleCSSValueMapping.cpp

Index: Source/core/css/LayoutStyleCSSValueMapping.cpp
diff --git a/Source/core/css/LayoutStyleCSSValueMapping.cpp b/Source/core/css/LayoutStyleCSSValueMapping.cpp
index a33156932f6c3e183d3e8143a2626baca6d2b4a8..53f3d303c0cc142f0dec02a6f19b15469b2dd5b0 100644
--- a/Source/core/css/LayoutStyleCSSValueMapping.cpp
+++ b/Source/core/css/LayoutStyleCSSValueMapping.cpp
@@ -2556,10 +2556,16 @@ PassRefPtrWillBeRawPtr<CSSValue> LayoutStyleCSSValueMapping::get(CSSPropertyID p
     case CSSPropertyEnableBackground:
         // the above properties are not yet implemented in the engine
         return nullptr;
+    case CSSPropertyCx:
+        return zoomAdjustedPixelValueForLength(svgStyle.cx(), style);
+    case CSSPropertyCy:
+        return zoomAdjustedPixelValueForLength(svgStyle.cy(), style);
     case CSSPropertyX:
         return zoomAdjustedPixelValueForLength(svgStyle.x(), style);
     case CSSPropertyY:
         return zoomAdjustedPixelValueForLength(svgStyle.y(), style);
+    case CSSPropertyR:
+        return zoomAdjustedPixelValueForLength(svgStyle.r(), style);
     case CSSPropertyRx:
         return zoomAdjustedPixelValueForLength(svgStyle.rx(), style);
     case CSSPropertyRy: