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

LayoutTests/svg/custom/grayscale-gradient-mask-expected.txt

Index: LayoutTests/svg/custom/grayscale-gradient-mask-expected.txt
diff --git a/LayoutTests/svg/custom/grayscale-gradient-mask-expected.txt b/LayoutTests/svg/custom/grayscale-gradient-mask-expected.txt
index a01b39e09c7353e119892800725b1fde563411c8..33ecf8dcfb908f7b93ec14e6edddd8ab726b4416 100644
--- a/LayoutTests/svg/custom/grayscale-gradient-mask-expected.txt
+++ b/LayoutTests/svg/custom/grayscale-gradient-mask-expected.txt
@@ -3,11 +3,11 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,143) size 781x294
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-      RenderSVGResourceLinearGradient {linearGradient} [id="Gradient"] [gradientUnits=userSpaceOnUse] [start=(0,0)] [end=(800,0)]
+      LayoutSVGResourceLinearGradient {linearGradient} [id="Gradient"] [gradientUnits=userSpaceOnUse] [start=(0,0)] [end=(800,0)]
         RenderSVGGradientStop {stop} [offset=0.00] [color=#FFFFFF]
         RenderSVGGradientStop {stop} [offset=1.00] [color=#000000]
-    RenderSVGResourceMasker {mask} [id="Mask"] [maskUnits=userSpaceOnUse] [maskContentUnits=userSpaceOnUse]
+    LayoutSVGResourceMasker {mask} [id="Mask"] [maskUnits=userSpaceOnUse] [maskContentUnits=userSpaceOnUse]
       RenderSVGRect {rect} at (0,143) size 781x294 [fill={[type=LINEAR-GRADIENT] [id="Gradient"]}] [x=0.00] [y=0.00] [width=800.00] [height=300.00]
     RenderSVGRect {rect} at (0,143) size 781x294 [fill={[type=SOLID] [color=#FF8080]}] [x=0.00] [y=0.00] [width=800.00] [height=300.00]
     RenderSVGRect {rect} at (0,241) size 781x99 [fill={[type=SOLID] [color=#0000FF]}] [x=0.00] [y=100.00] [width=800.00] [height=100.00]
-      [masker="Mask"] RenderSVGResourceMasker {mask} at (0,0) size 800x300
+      [masker="Mask"] LayoutSVGResourceMasker {mask} at (0,0) size 800x300