Move RenderSVGRect to layout/svg

LayoutTests/svg/text/text-spacing-01-b-expected.txt

Index: LayoutTests/svg/text/text-spacing-01-b-expected.txt
diff --git a/LayoutTests/svg/text/text-spacing-01-b-expected.txt b/LayoutTests/svg/text/text-spacing-01-b-expected.txt
index 76a1460eeca1f9084bb0153c4588b0ba790ebb02..24aac8139027083211bd73f418314bc834e02f0b 100644
--- a/LayoutTests/svg/text/text-spacing-01-b-expected.txt
+++ b/LayoutTests/svg/text/text-spacing-01-b-expected.txt
@@ -63,6 +63,6 @@ layer at (0,0) size 800x600
     LayoutSVGText {text} at (5,51) size 40x8 contains 1 chunk(s)
       LayoutSVGInlineText {#text} at (0,0) size 40x7
         chunk 1 text run 1 at (5.00,57.00) startOffset 0 endOffset 16 width 39.50: "$Revision: 1.6 $"
-    RenderSVGRect {rect} at (5,5) size 790x590 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=78.00] [height=58.00]
+    LayoutSVGRect {rect} at (5,5) size 790x590 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=78.00] [height=58.00]
 selection start: position 1 of child 0 {#text} of child 1 {text} of child 1 {g} of child 13 {g} of child 19 {svg} of document
 selection end:   position 16 of child 0 {#text} of child 15 {text} of child 19 {svg} of document