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

LayoutTests/platform/linux/svg/custom/invalid-css-expected.txt

Index: LayoutTests/platform/linux/svg/custom/invalid-css-expected.txt
diff --git a/LayoutTests/platform/linux/svg/custom/invalid-css-expected.txt b/LayoutTests/platform/linux/svg/custom/invalid-css-expected.txt
index e2de6b535c20662895546f3f1a60d0c2c8792b30..dab87459880d178165004ccfab3675a17ae765aa 100644
--- a/LayoutTests/platform/linux/svg/custom/invalid-css-expected.txt
+++ b/LayoutTests/platform/linux/svg/custom/invalid-css-expected.txt
@@ -1,12 +1,12 @@
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
-  RenderSVGRoot {svg} at (0,0) size 510x224
+  LayoutSVGRoot {svg} at (0,0) size 510x224
     LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
       LayoutSVGResourceClipper {clipPath} [id="clip1"] [clipPathUnits=userSpaceOnUse]
         LayoutSVGEllipse {circle} at (33,50) size 34x34 [fill={[type=SOLID] [color=#000000]}] [cx=30.00] [cy=40.00] [r=10.00]
       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]
     LayoutSVGResourceFilter {filter} [id="blurxy"] [filterUnits=objectBoundingBox] [primitiveUnits=userSpaceOnUse]
       [feGaussianBlur stdDeviation="5.00, 1.00"]
         [SourceGraphic]