CL for perf tryjob on win

Source/core/css/BasicShapeFunctions.cpp

Index: Source/core/css/BasicShapeFunctions.cpp
diff --git a/Source/core/css/BasicShapeFunctions.cpp b/Source/core/css/BasicShapeFunctions.cpp
index 1ebbecccbf91220eec1f851d643f49815e35793a..2880c07d4e1a3fc9955bf43b619524748dce5d38 100644
--- a/Source/core/css/BasicShapeFunctions.cpp
+++ b/Source/core/css/BasicShapeFunctions.cpp
@@ -65,7 +65,7 @@ static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> basicShapeRadiusToCSSValue(CSSV
     return nullptr;
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> valueForBasicShape(const ComputedStyle& style, const BasicShape* basicShape)
+CSSValue valueForBasicShape(const ComputedStyle& style, const BasicShape* basicShape)
 {
     CSSValuePool& pool = cssValuePool();
 
@@ -122,6 +122,7 @@ PassRefPtrWillBeRawPtr<CSSValue> valueForBasicShape(const ComputedStyle& style,
         break;
     }
     default:
+        ASSERT_NOT_REACHED();
         break;
     }