Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

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

Index: LayoutTests/platform/linux/svg/text/text-deco-01-b-expected.txt
diff --git a/LayoutTests/platform/linux/svg/text/text-deco-01-b-expected.txt b/LayoutTests/platform/linux/svg/text/text-deco-01-b-expected.txt
index 24d5d5fc7e0b77a4d65971cb1c2ae868fdeb41f8..fa1152426c37703df66782331d87e8b29e530e03 100644
--- a/LayoutTests/platform/linux/svg/text/text-deco-01-b-expected.txt
+++ b/LayoutTests/platform/linux/svg/text/text-deco-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 (16,7) size 623x462
+    LayoutSVGContainer {g} at (16,7) size 623x462
       LayoutSVGText {text} at (10,4) size 155x20 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 155x20
           chunk 1 text run 1 at (10.00,20.00) startOffset 0 endOffset 23 width 154.80: "Test 'text-decoration'."
-      RenderSVGContainer {g} at (40,71) size 599x398
+      LayoutSVGContainer {g} at (40,71) size 599x398
         LayoutSVGText {text} at (25,43) size 121x28 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 121x27
             chunk 1 text run 1 at (25.00,65.00) startOffset 0 endOffset 11 width 120.60: "Normal text"