Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/linux/svg/custom/text-x-dx-lists-expected.txt

Index: LayoutTests/platform/linux/svg/custom/text-x-dx-lists-expected.txt
diff --git a/LayoutTests/platform/linux/svg/custom/text-x-dx-lists-expected.txt b/LayoutTests/platform/linux/svg/custom/text-x-dx-lists-expected.txt
index e7c4a001d10015469485d8854dfc23a762992dcc..dbc6050879ef1fb4403885cd0290a597dbf2930b 100644
--- a/LayoutTests/platform/linux/svg/custom/text-x-dx-lists-expected.txt
+++ b/LayoutTests/platform/linux/svg/custom/text-x-dx-lists-expected.txt
@@ -28,7 +28,7 @@ layer at (0,0) size 800x600
           chunk 1 text run 1 at (50.00,80.00) startOffset 0 endOffset 1 width 10.50: "B"
       LayoutSVGInlineText {#text} at (60,0) size 11x18
         chunk 1 text run 1 at (70.00,80.00) startOffset 0 endOffset 1 width 10.50: "C"
-    RenderSVGContainer {g} at (20,212) size 141x156 [transform={m=((1.00,0.00)(0.00,1.00)) t=(-5.00,0.00)}]
+    LayoutSVGContainer {g} at (20,212) size 141x156 [transform={m=((1.00,0.00)(0.00,1.00)) t=(-5.00,0.00)}]
       LayoutSVGText {text} at (15,106) size 71x18 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 71x18
           chunk 1 text run 1 at (15.00,120.00) startOffset 0 endOffset 1 width 11.00: "A"