[CSS Exclusions] Programmatic layout tests fail when subpixel layout is disabled

LayoutTests/fast/exclusions/resources/rounded-rectangle.js

Index: LayoutTests/fast/exclusions/resources/rounded-rectangle.js
diff --git a/LayoutTests/fast/exclusions/resources/rounded-rectangle.js b/LayoutTests/fast/exclusions/resources/rounded-rectangle.js
index d4629c0ee8ae5f2386db4f0f82a0f5e537b6e0a6..054f9ac422629a752a3543e618ab575095468286 100644
--- a/LayoutTests/fast/exclusions/resources/rounded-rectangle.js
+++ b/LayoutTests/fast/exclusions/resources/rounded-rectangle.js
@@ -95,12 +95,12 @@ function simulateShape(elementId, stylesheet, dimensions, lineHeight) {
 
         var paddingLeft = document.createElement("div");
         paddingLeft.setAttribute("class", "float left");
-        paddingLeft.style.width = SubPixelLayout.roundLineLeft(dimensions.shapeX + inset) + "px";
+        paddingLeft.style.width = SubPixelLayout.snapToLayoutUnit(dimensions.shapeX + inset) + "px";
         element.appendChild(paddingLeft);
 
         var paddingRight = document.createElement("div");
         paddingRight.setAttribute("class", "float right");
-        paddingRight.style.width = SubPixelLayout.roundLineRight((dimensions.width - dimensions.shapeWidth - dimensions.shapeX) + inset) + "px";
+        paddingRight.style.width = SubPixelLayout.snapToLayoutUnit((dimensions.width - dimensions.shapeWidth - dimensions.shapeX) + inset) + "px";
         element.appendChild(paddingRight);
     }
 }