Move the remaining rendering/svg/RenderSVG* files to layout.

LayoutTests/platform/win/svg/custom/getsvgdocument-expected.txt

Index: LayoutTests/platform/win/svg/custom/getsvgdocument-expected.txt
diff --git a/LayoutTests/platform/win/svg/custom/getsvgdocument-expected.txt b/LayoutTests/platform/win/svg/custom/getsvgdocument-expected.txt
index 361a70fd625d7d9a5a9c95456590653b12bfebf5..228368b6161698d586a7966d4fc035fc22a5f630 100644
--- a/LayoutTests/platform/win/svg/custom/getsvgdocument-expected.txt
+++ b/LayoutTests/platform/win/svg/custom/getsvgdocument-expected.txt
@@ -16,7 +16,7 @@ layer at (8,60) size 85x20
     layer at (0,0) size 85x20
       RenderView at (0,0) size 85x20
     layer at (0,0) size 85x20
-      RenderSVGRoot {svg} at (0,0) size 85x20
+      LayoutSVGRoot {svg} at (0,0) size 85x20
         LayoutSVGRect {rect} at (0,0) size 85x20 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=85.00] [height=20.00]
         LayoutSVGText {text} at (5,2) size 70x17 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 70x17
@@ -26,7 +26,7 @@ layer at (8,98) size 85x20
     layer at (0,0) size 85x20
       RenderView at (0,0) size 85x20
     layer at (0,0) size 85x20
-      RenderSVGRoot {svg} at (0,0) size 85x20
+      LayoutSVGRoot {svg} at (0,0) size 85x20
         LayoutSVGRect {rect} at (0,0) size 85x20 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=85.00] [height=20.00]
         LayoutSVGText {text} at (5,2) size 70x17 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 70x17