Move RenderSVGRect to layout/svg

LayoutTests/platform/mac/svg/custom/empty-mask-expected.txt

Index: LayoutTests/platform/mac/svg/custom/empty-mask-expected.txt
diff --git a/LayoutTests/platform/mac/svg/custom/empty-mask-expected.txt b/LayoutTests/platform/mac/svg/custom/empty-mask-expected.txt
index bf67936be58bc3d6cc4b176f66e959b19b1b643b..8f4e98aea27b7fe7f53aab679b36b232d5633704 100644
--- a/LayoutTests/platform/mac/svg/custom/empty-mask-expected.txt
+++ b/LayoutTests/platform/mac/svg/custom/empty-mask-expected.txt
@@ -4,8 +4,8 @@ layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,0) size 0x0
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
       LayoutSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=userSpaceOnUse]
-        RenderSVGRect {rect} at (0,0) size 0x0 [fill={[type=SOLID] [color=#FFFFFF]}] [x=-0.50] [y=-0.50] [width=0.10] [height=0.10]
-    RenderSVGRect {rect} at (0,0) size 0x0 [fill={[type=SOLID] [color=#008000]}] [x=20.00] [y=20.00] [width=100.00] [height=100.00]
+        LayoutSVGRect {rect} at (0,0) size 0x0 [fill={[type=SOLID] [color=#FFFFFF]}] [x=-0.50] [y=-0.50] [width=0.10] [height=0.10]
+    LayoutSVGRect {rect} at (0,0) size 0x0 [fill={[type=SOLID] [color=#008000]}] [x=20.00] [y=20.00] [width=100.00] [height=100.00]
       [masker="mask"] LayoutSVGResourceMasker {mask} at (0,0) size 0x0
     LayoutSVGText {text} at (60,46) size 23x18 contains 1 chunk(s)
       [masker="mask"] LayoutSVGResourceMasker {mask} at (0,0) size 0x0