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

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

Index: LayoutTests/platform/mac/svg/css/text-gradient-shadow-expected.txt
diff --git a/LayoutTests/platform/mac/svg/css/text-gradient-shadow-expected.txt b/LayoutTests/platform/mac/svg/css/text-gradient-shadow-expected.txt
index c047a6cdc16e94056ee332d3613d909a6af8e56e..491bfa866587b541ec61e20b6018683728b354d3 100644
--- a/LayoutTests/platform/mac/svg/css/text-gradient-shadow-expected.txt
+++ b/LayoutTests/platform/mac/svg/css/text-gradient-shadow-expected.txt
@@ -1,11 +1,11 @@
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  RenderSVGRoot {svg} at (200,20) size 441x270
+  LayoutSVGRoot {svg} at (200,20) size 441x270
     LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
       LayoutSVGResourceLinearGradient {linearGradient} [id="gradient"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
-        RenderSVGGradientStop {stop} [offset=0.00] [color=#FF0000]
-        RenderSVGGradientStop {stop} [offset=1.00] [color=#0000FF]
+        LayoutSVGGradientStop {stop} [offset=0.00] [color=#FF0000]
+        LayoutSVGGradientStop {stop} [offset=1.00] [color=#0000FF]
     LayoutSVGText {text} at (200,20) size 401x230 contains 1 chunk(s)
       LayoutSVGInlineText {#text} at (0,0) size 401x230
         chunk 1 text run 1 at (200.00,200.00) startOffset 0 endOffset 3 width 400.10: "SVG"