Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

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

Index: LayoutTests/platform/win/svg/text/text-deco-01-b-expected.txt
diff --git a/LayoutTests/platform/win/svg/text/text-deco-01-b-expected.txt b/LayoutTests/platform/win/svg/text/text-deco-01-b-expected.txt
index b78ae686a4934064bc5bbbeff2e975c9a74c2bcf..4b451755450fb4b35b25c1366baeb4693c555481 100644
--- a/LayoutTests/platform/win/svg/text/text-deco-01-b-expected.txt
+++ b/LayoutTests/platform/win/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 (16,9) size 638x459
+    LayoutSVGContainer {g} at (16,9) size 638x459
       LayoutSVGText {text} at (10,5) size 152x19 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 152x18
           chunk 1 text run 1 at (10.00,20.00) startOffset 0 endOffset 23 width 151.92: "Test 'text-decoration'."
-      RenderSVGContainer {g} at (40,71) size 614x397
+      LayoutSVGContainer {g} at (40,71) size 614x397
         LayoutSVGText {text} at (25,43) size 123x27 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 123x27
             chunk 1 text run 1 at (25.00,65.00) startOffset 0 endOffset 11 width 122.70: "Normal text"