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

LayoutTests/svg/custom/uri-reference-handling-expected.txt

Index: LayoutTests/svg/custom/uri-reference-handling-expected.txt
diff --git a/LayoutTests/svg/custom/uri-reference-handling-expected.txt b/LayoutTests/svg/custom/uri-reference-handling-expected.txt
index 5af69ced9365fa59dbac5da40f1bcf785645c72d..a3d688515d146a35913531cf1ca6a90b1fabfe3c 100644
--- a/LayoutTests/svg/custom/uri-reference-handling-expected.txt
+++ b/LayoutTests/svg/custom/uri-reference-handling-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 110x110
+  LayoutSVGRoot {svg} at (0,0) size 110x110
     LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
       LayoutSVGResourceLinearGradient {linearGradient} [id="green"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
-        RenderSVGGradientStop {stop} [offset=0.50] [color=#008000]
+        LayoutSVGGradientStop {stop} [offset=0.50] [color=#008000]
       LayoutSVGResourceLinearGradient {linearGradient} [id="red"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
-        RenderSVGGradientStop {stop} [offset=0.00] [color=#FF0000]
+        LayoutSVGGradientStop {stop} [offset=0.00] [color=#FF0000]
     LayoutSVGRect {rect} at (0,0) size 50x50 [fill={[type=LINEAR-GRADIENT] [id="green"]}] [x=0.00] [y=0.00] [width=50.00] [height=50.00]
     LayoutSVGRect {rect} at (60,0) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=60.00] [y=0.00] [width=50.00] [height=50.00]
     LayoutSVGRect {rect} at (0,60) size 50x50 [fill={[type=LINEAR-GRADIENT] [id="green"]}] [x=0.00] [y=60.00] [width=50.00] [height=50.00]