Move rendering/svg/RenderSVGResource* to layout/svg.

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 b889a0f1c1f3d92241c9c60e09ff3b11bc6a411a..e05e5ac35663a54e34b1f3c3a625154b86efbfc8 100644
--- a/LayoutTests/svg/custom/uri-reference-handling-expected.txt
+++ b/LayoutTests/svg/custom/uri-reference-handling-expected.txt
@@ -3,9 +3,9 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,0) size 110x110
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-      RenderSVGResourceLinearGradient {linearGradient} [id="green"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
+      LayoutSVGResourceLinearGradient {linearGradient} [id="green"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
         RenderSVGGradientStop {stop} [offset=0.50] [color=#008000]
-      RenderSVGResourceLinearGradient {linearGradient} [id="red"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
+      LayoutSVGResourceLinearGradient {linearGradient} [id="red"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,1)]
         RenderSVGGradientStop {stop} [offset=0.00] [color=#FF0000]
     RenderSVGRect {rect} at (0,0) size 50x50 [fill={[type=LINEAR-GRADIENT] [id="green"]}] [x=0.00] [y=0.00] [width=50.00] [height=50.00]
     RenderSVGRect {rect} at (60,0) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=60.00] [y=0.00] [width=50.00] [height=50.00]