Move RenderSVGRect to layout/svg

LayoutTests/svg/custom/mask-excessive-malloc-expected.txt

Index: LayoutTests/svg/custom/mask-excessive-malloc-expected.txt
diff --git a/LayoutTests/svg/custom/mask-excessive-malloc-expected.txt b/LayoutTests/svg/custom/mask-excessive-malloc-expected.txt
index cbb806bef471f8f2076505f2b793cb2202b54143..f3390c204f2a191c020b2128c153c6b8d0a516d2 100644
--- a/LayoutTests/svg/custom/mask-excessive-malloc-expected.txt
+++ b/LayoutTests/svg/custom/mask-excessive-malloc-expected.txt
@@ -3,6 +3,6 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (200,200) size 100x200
     LayoutSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=userSpaceOnUse]
-      RenderSVGRect {rect} at (0,0) size 800x600 [fill={[type=SOLID] [color=#FFFFFF]}] [x=0.00] [y=0.00] [width=2147483648.00] [height=2147483648.00]
+      LayoutSVGRect {rect} at (0,0) size 800x600 [fill={[type=SOLID] [color=#FFFFFF]}] [x=0.00] [y=0.00] [width=2147483648.00] [height=2147483648.00]
     RenderSVGPath {path} at (200,200) size 100x200 [fill={[type=SOLID] [color=#0000FF]}] [data="M 200 200 L 300 200 L 300 400 L 200 400 Z"]
       [masker="mask"] LayoutSVGResourceMasker {mask} at (190,180) size 2147483520x2147483520