Move RenderSVGRect to layout/svg

LayoutTests/svg/css/rect-gradient-stroke-shadow-expected.txt

Index: LayoutTests/svg/css/rect-gradient-stroke-shadow-expected.txt
diff --git a/LayoutTests/svg/css/rect-gradient-stroke-shadow-expected.txt b/LayoutTests/svg/css/rect-gradient-stroke-shadow-expected.txt
index 2c31524210c8b36e445dff85c48a90e53936f3f7..03b23ffe54d230fa895b4f6582d82ebc04e3a27c 100644
--- a/LayoutTests/svg/css/rect-gradient-stroke-shadow-expected.txt
+++ b/LayoutTests/svg/css/rect-gradient-stroke-shadow-expected.txt
@@ -12,5 +12,5 @@ layer at (0,0) size 800x600
           [feGaussianBlur stdDeviation="10.00, 10.00"]
             [feOffset dx="75.00" dy="75.00"]
               [SourceAlpha]
-    RenderSVGRect {rect} at (70,70) size 600x530 [stroke={[type=LINEAR-GRADIENT] [id="gradient"] [stroke width=50.00]}] [fill={[type=SOLID] [color=#00000000]}] [x=100.00] [y=100.00] [width=300.00] [height=300.00]
+    LayoutSVGRect {rect} at (70,70) size 600x530 [stroke={[type=LINEAR-GRADIENT] [id="gradient"] [stroke width=50.00]}] [fill={[type=SOLID] [color=#00000000]}] [x=100.00] [y=100.00] [width=300.00] [height=300.00]
       [filter="shadow"] LayoutSVGResourceFilter {filter} at (70,70) size 600x600