Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/svg/custom/use-image-in-g-expected.txt

Index: LayoutTests/svg/custom/use-image-in-g-expected.txt
diff --git a/LayoutTests/svg/custom/use-image-in-g-expected.txt b/LayoutTests/svg/custom/use-image-in-g-expected.txt
index 8b029314226591c9da734d7b3eb8187880646182..2582d52558edd4dfc5467b39b8cd723ffae41944 100644
--- a/LayoutTests/svg/custom/use-image-in-g-expected.txt
+++ b/LayoutTests/svg/custom/use-image-in-g-expected.txt
@@ -2,10 +2,10 @@ layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (10,10) size 200x170
-    RenderSVGContainer {g} at (10,10) size 200x80
+    LayoutSVGContainer {g} at (10,10) size 200x80
       RenderSVGRect {rect} at (10,10) size 200x80 [fill={[type=SOLID] [color=#CCCCCC]}] [x=10.00] [y=10.00] [width=200.00] [height=80.00]
       RenderSVGImage {image} at (20,20) size 180x60
-    RenderSVGContainer {use} at (10,100) size 200x80 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,90.00)}]
-      RenderSVGContainer {g} at (10,100) size 200x80
+    LayoutSVGContainer {use} at (10,100) size 200x80 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,90.00)}]
+      LayoutSVGContainer {g} at (10,100) size 200x80
         RenderSVGRect {rect} at (10,100) size 200x80 [fill={[type=SOLID] [color=#CCCCCC]}] [x=10.00] [y=10.00] [width=200.00] [height=80.00]
         RenderSVGImage {image} at (20,110) size 180x60