Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/linux/svg/text/text-tselect-01-b-expected.txt

Index: LayoutTests/platform/linux/svg/text/text-tselect-01-b-expected.txt
diff --git a/LayoutTests/platform/linux/svg/text/text-tselect-01-b-expected.txt b/LayoutTests/platform/linux/svg/text/text-tselect-01-b-expected.txt
index ab7e4fecde7b9b550364e52835157471117580d6..dd1d04ae96996061d54797f11f6f070af47e6ae0 100644
--- a/LayoutTests/platform/linux/svg/text/text-tselect-01-b-expected.txt
+++ b/LayoutTests/platform/linux/svg/text/text-tselect-01-b-expected.txt
@@ -2,11 +2,11 @@ layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,0) size 800x600
-    RenderSVGContainer {g} at (0,0) size 800x600
+    LayoutSVGContainer {g} at (0,0) size 800x600
       LayoutSVGText {text} at (10,4) size 311x20 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 311x20
           chunk 1 text run 1 at (10.00,20.00) startOffset 0 endOffset 46 width 310.20: "Test single line and multiline text selection."
-      RenderSVGContainer {g} at (41,82) size 615x366
+      LayoutSVGContainer {g} at (41,82) size 615x366
         LayoutSVGText {text} at (25,49) size 260x20 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 260x20
             chunk 1 text run 1 at (25.00,65.00) startOffset 0 endOffset 37 width 259.20: "Here is a stand-alone 'text' element."