Mask/background-repeat: round should round the number of tiles of an image to the nearest natural n…

LayoutTests/css3/masking/mask-repeat-round-auto1-expected.html

Index: LayoutTests/css3/masking/mask-repeat-round-auto1-expected.html
diff --git a/LayoutTests/css3/masking/mask-repeat-round-auto1-expected.html b/LayoutTests/css3/masking/mask-repeat-round-auto1-expected.html
index 4e8a6fcae01f9901b112da28df1bd9745c59ae1f..6cb020b6fc36ebaf5143224eeae4a33e045af056 100644
--- a/LayoutTests/css3/masking/mask-repeat-round-auto1-expected.html
+++ b/LayoutTests/css3/masking/mask-repeat-round-auto1-expected.html
@@ -14,7 +14,7 @@
                 border: 50px solid blue;
                 padding: 50px;
                 -webkit-mask-image: url(resources/circle.png);
-                -webkit-mask-size: 100px 79px;
+                -webkit-mask-size: 111px 88px;
                 -webkit-mask-repeat: repeat;
                 -webkit-mask-origin: border-box;
                 -webkit-mask-clip: border-box;