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

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

Index: LayoutTests/platform/linux/svg/custom/fill-fallback-expected.txt
diff --git a/LayoutTests/platform/linux/svg/custom/fill-fallback-expected.txt b/LayoutTests/platform/linux/svg/custom/fill-fallback-expected.txt
index 1eee2c0173a3324767b52531617900a6b7c70c69..432454ac314b49bdd990c44ba52c51ba6450ec4c 100644
--- a/LayoutTests/platform/linux/svg/custom/fill-fallback-expected.txt
+++ b/LayoutTests/platform/linux/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 464x194
+  LayoutSVGRoot {svg} at (0,0) size 464x194
     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 (0,135) size 296x19 contains 1 chunk(s)
       LayoutSVGInlineText {#text} at (0,0) size 296x19