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

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

Index: LayoutTests/platform/mac/svg/custom/getsvgdocument-expected.txt
diff --git a/LayoutTests/platform/mac/svg/custom/getsvgdocument-expected.txt b/LayoutTests/platform/mac/svg/custom/getsvgdocument-expected.txt
index eb2ca414616e51f1992d7acf360bf73d9afab8b1..6db496a0d1b14c133eb4b4b9ee9f8cf43acf936e 100644
--- a/LayoutTests/platform/mac/svg/custom/getsvgdocument-expected.txt
+++ b/LayoutTests/platform/mac/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 70x18 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 70x18
@@ -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 70x18 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 70x18