Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/linux/svg/custom/use-recursion-4-expected.txt

Index: LayoutTests/platform/linux/svg/custom/use-recursion-4-expected.txt
diff --git a/LayoutTests/platform/linux/svg/custom/use-recursion-4-expected.txt b/LayoutTests/platform/linux/svg/custom/use-recursion-4-expected.txt
index 25226be1742020d4af23bde26db35ff8c22e4d6b..37e51e7c2de09483e68509cc35b5594c99deac53 100644
--- a/LayoutTests/platform/linux/svg/custom/use-recursion-4-expected.txt
+++ b/LayoutTests/platform/linux/svg/custom/use-recursion-4-expected.txt
@@ -3,12 +3,12 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (20,92) size 273x36
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-      RenderSVGContainer {g} at (0,0) size 0x0
-        RenderSVGContainer {use} at (0,0) size 0x0
-      RenderSVGContainer {g} at (0,0) size 125x25
+      LayoutSVGContainer {g} at (0,0) size 0x0
+        LayoutSVGContainer {use} at (0,0) size 0x0
+      LayoutSVGContainer {g} at (0,0) size 125x25
         RenderSVGRect {rect} at (0,0) size 125x25 [stroke={[type=SOLID] [color=#000080] [stroke width=5.00]}] [fill={[type=SOLID] [color=#FF0000]}] [x=0.00] [y=0.00] [width=60.00] [height=10.00]
-        RenderSVGContainer {use} at (0,0) size 0x0
+        LayoutSVGContainer {use} at (0,0) size 0x0
     LayoutSVGText {text} at (10,46) size 137x18 contains 1 chunk(s)
       LayoutSVGInlineText {#text} at (0,0) size 137x18
         chunk 1 text run 1 at (10.00,60.00) startOffset 0 endOffset 22 width 136.50: "This should not crash."
-    RenderSVGContainer {use} at (0,0) size 0x0 [transform={m=((1.00,0.00)(0.00,1.00)) t=(25.00,25.00)}]
+    LayoutSVGContainer {use} at (0,0) size 0x0 [transform={m=((1.00,0.00)(0.00,1.00)) t=(25.00,25.00)}]