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

LayoutTests/svg/custom/mask-colorspace-expected.txt

Index: LayoutTests/svg/custom/mask-colorspace-expected.txt
diff --git a/LayoutTests/svg/custom/mask-colorspace-expected.txt b/LayoutTests/svg/custom/mask-colorspace-expected.txt
index 92e00b1169b52b3da009f58e0adb2ca2900d8d34..ab74740c1e3f6e08add0e2af830933802ae23735 100644
--- a/LayoutTests/svg/custom/mask-colorspace-expected.txt
+++ b/LayoutTests/svg/custom/mask-colorspace-expected.txt
@@ -3,10 +3,10 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (20,20) size 230x100
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-      RenderSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=userSpaceOnUse]
+      LayoutSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=userSpaceOnUse]
         RenderSVGRect {rect} at (0,0) size 140x140 [fill={[type=SOLID] [color=#00E600]}] [x=0.00] [y=0.00] [width=140.00] [height=140.00]
         RenderSVGEllipse {circle} at (30,30) size 80x80 [fill={[type=SOLID] [color=#00FD00]}] [cx=70.00] [cy=70.00] [r=40.00]
     RenderSVGRect {rect} at (20,20) size 100x100 [fill={[type=SOLID] [color=#000000]}] [x=20.00] [y=20.00] [width=100.00] [height=100.00]
-      [masker="mask"] RenderSVGResourceMasker {mask} at (10,10) size 120x120
+      [masker="mask"] LayoutSVGResourceMasker {mask} at (10,10) size 120x120
     RenderSVGRect {rect} at (150,20) size 100x100 [fill={[type=SOLID] [color=#6F6F6F]}] [x=150.00] [y=20.00] [width=100.00] [height=100.00]
     RenderSVGEllipse {circle} at (160,30) size 80x80 [fill={[type=SOLID] [color=#4C4C4C]}] [cx=200.00] [cy=70.00] [r=40.00]