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

LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt

Index: LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
diff --git a/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt b/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
index ba041beda872ef6c0ed0df5bd84a727c2f70c834..236a7154485f1b1bf74a6f6d9a82508efef35965 100644
--- a/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
+++ b/LayoutTests/platform/mac/svg/custom/fill-fallback-expected.txt
@@ -3,7 +3,7 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,0) size 497x194
     RenderSVGRect {rect} at (0,0) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-    RenderSVGResourceLinearGradient {linearGradient} [id="grad"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
+    LayoutSVGResourceLinearGradient {linearGradient} [id="grad"] [gradientUnits=objectBoundingBox] [start=(0,0)] [end=(1,0)]
       RenderSVGGradientStop {stop} [offset=0.00] [color=#008000]
     RenderSVGRect {rect} at (150,0) size 100x100 [fill={[type=LINEAR-GRADIENT] [id="grad"]}] [x=150.00] [y=0.00] [width=100.00] [height=100.00]
     RenderSVGText {text} at (0,136) size 315x18 contains 1 chunk(s)