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

LayoutTests/svg/custom/mask-on-multiple-objects-expected.txt

Index: LayoutTests/svg/custom/mask-on-multiple-objects-expected.txt
diff --git a/LayoutTests/svg/custom/mask-on-multiple-objects-expected.txt b/LayoutTests/svg/custom/mask-on-multiple-objects-expected.txt
index 764ffaa263995ae99240176383088d172eb8400d..438fa49f8a847ad29d1848a30ce3dae64b2e627f 100644
--- a/LayoutTests/svg/custom/mask-on-multiple-objects-expected.txt
+++ b/LayoutTests/svg/custom/mask-on-multiple-objects-expected.txt
@@ -3,9 +3,9 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (20,20) size 220x100
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-      RenderSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=objectBoundingBox]
+      LayoutSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=objectBoundingBox]
         RenderSVGEllipse {circle} at (0,0) size 1x1 [fill={[type=SOLID] [color=#FFFFFF]}] [cx=0.50] [cy=0.50] [r=0.50]
     RenderSVGRect {rect} at (20,20) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=20.00] [y=20.00] [width=100.00] [height=100.00]
-      [masker="mask"] RenderSVGResourceMasker {mask} at (20,20) size 100x100
+      [masker="mask"] LayoutSVGResourceMasker {mask} at (20,20) size 100x100
     RenderSVGRect {rect} at (140,50) size 100x40 [fill={[type=SOLID] [color=#008000]}] [x=140.00] [y=50.00] [width=100.00] [height=40.00]
-      [masker="mask"] RenderSVGResourceMasker {mask} at (140,50) size 100x40
+      [masker="mask"] LayoutSVGResourceMasker {mask} at (140,50) size 100x40