Do refactor in collectGradientAttributes() and renderStyleForLengthResolve()

Source/core/svg/SVGRadialGradientElement.cpp

Index: Source/core/svg/SVGRadialGradientElement.cpp
diff --git a/Source/core/svg/SVGRadialGradientElement.cpp b/Source/core/svg/SVGRadialGradientElement.cpp
index d8fe2a87533664771aa6a0172e1ccf679ad55592..d70807cf15c956597ae025935ad6635322e11736 100644
--- a/Source/core/svg/SVGRadialGradientElement.cpp
+++ b/Source/core/svg/SVGRadialGradientElement.cpp
@@ -133,11 +133,9 @@ RenderObject* SVGRadialGradientElement::createRenderer(RenderStyle*)
 bool SVGRadialGradientElement::collectGradientAttributes(RadialGradientAttributes& attributes)
 {
     HashSet<SVGGradientElement*> processedGradients;
-
-    bool isRadial = true;
     SVGGradientElement* current = this;
 
-    while (current) {
+    do {
         if (!current->renderer())
             return false;
 
@@ -159,7 +157,7 @@ bool SVGRadialGradientElement::collectGradientAttributes(RadialGradientAttribute
                 attributes.setStops(stops);
         }
 
-        if (isRadial) {
+        if (current->hasTagName(SVGNames::radialGradientTag)) {
             SVGRadialGradientElement* radial = toSVGRadialGradientElement(current);
 
             if (!attributes.hasCx() && current->hasAttribute(SVGNames::cxAttr))
@@ -193,11 +191,9 @@ bool SVGRadialGradientElement::collectGradientAttributes(RadialGradientAttribute
                 current = 0;
                 break;
             }
-
-            isRadial = current->hasTagName(SVGNames::radialGradientTag);
         } else
             current = 0;
-    }
+    } while (current);
 
     // Handle default values for fx/fy
     if (!attributes.hasFx())