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

LayoutTests/platform/mac/svg/css/text-shadow-multiple-expected.txt

Index: LayoutTests/platform/mac/svg/css/text-shadow-multiple-expected.txt
diff --git a/LayoutTests/platform/mac/svg/css/text-shadow-multiple-expected.txt b/LayoutTests/platform/mac/svg/css/text-shadow-multiple-expected.txt
index ef86f0e778739176b07e4494334de2e05c71a61b..7b1500e5a1b13980b25d989ff231d2a03fcc2ecc 100644
--- a/LayoutTests/platform/mac/svg/css/text-shadow-multiple-expected.txt
+++ b/LayoutTests/platform/mac/svg/css/text-shadow-multiple-expected.txt
@@ -7,7 +7,7 @@ layer at (0,0) size 800x408
         RenderText {#text} at (0,0) size 456x18
           text run at (0,0) width 456: "The first two texts should look identical, as there is no shadow applied."
       RenderBlock (anonymous) at (0,34) size 800x154
-        RenderSVGRoot {svg} at (20,121) size 717x56
+        LayoutSVGRoot {svg} at (20,121) size 717x56
           LayoutSVGText {text} at (20,21) size 717x56 contains 1 chunk(s)
             LayoutSVGTSpan {tspan} at (0,0) size 95x56
               LayoutSVGInlineText {#text} at (0,0) size 95x56
@@ -30,7 +30,7 @@ layer at (0,0) size 800x408
         RenderText {#text} at (0,0) size 568x18
           text run at (0,0) width 568: "The next two texts have subtle differences, as the stroke/fill is painted seperated in SVG."
       RenderBlock (anonymous) at (0,238) size 800x154
-        RenderSVGRoot {svg} at (0,308) size 744x89
+        LayoutSVGRoot {svg} at (0,308) size 744x89
           LayoutSVGText {text} at (20,21) size 717x56 contains 1 chunk(s)
             LayoutSVGTSpan {tspan} at (0,0) size 95x56
               LayoutSVGInlineText {#text} at (0,0) size 95x56