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

LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt

Index: LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
diff --git a/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt b/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
index 3c925de1306daff356c2222cb113be341ecbd90f..2ee07a15319e19cc4d6a20f6cc6a24a9ecf22504 100644
--- a/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
+++ b/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
@@ -1,10 +1,10 @@
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  RenderSVGRoot {svg} at (0,0) size 497x194
+  LayoutSVGRoot {svg} at (0,0) size 497x194
     LayoutSVGRect {rect} at (0,0) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
     LayoutSVGResourceLinearGradient {linearGradient} [id="grad"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
-      RenderSVGGradientStop {stop} [offset=0.00] [color=#008000]
+      LayoutSVGGradientStop {stop} [offset=0.00] [color=#008000]
     LayoutSVGRect {rect} at (150,0) size 100x100 [fill={[type=LINEAR-GRADIENT] [id="grad"]}] [x=150.00] [y=0.00] [width=100.00] [height=100.00]
     LayoutSVGText {text} at (0,136) size 315x18 contains 1 chunk(s)
       LayoutSVGInlineText {#text} at (0,0) size 315x18