Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/mac/svg/W3C-SVG-1.1/animate-elem-25-t-expected.txt

Index: LayoutTests/platform/mac/svg/W3C-SVG-1.1/animate-elem-25-t-expected.txt
diff --git a/LayoutTests/platform/mac/svg/W3C-SVG-1.1/animate-elem-25-t-expected.txt b/LayoutTests/platform/mac/svg/W3C-SVG-1.1/animate-elem-25-t-expected.txt
index 6fcdefab27faf5011e2e817aa89d3b5d7f53ba88..2179587cb4b2468a032e4a49860f460fb8b16075 100644
--- a/LayoutTests/platform/mac/svg/W3C-SVG-1.1/animate-elem-25-t-expected.txt
+++ b/LayoutTests/platform/mac/svg/W3C-SVG-1.1/animate-elem-25-t-expected.txt
@@ -2,11 +2,11 @@ layer at (0,0) size 480x360
   RenderView at (0,0) size 480x360
 layer at (0,0) size 480x360
   RenderSVGRoot {svg} at (0,0) size 480x360
-    RenderSVGContainer {g} at (20,27) size 414x190
+    LayoutSVGContainer {g} at (20,27) size 414x190
       LayoutSVGText {text} at (30,27) size 404x16 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 404x16
           chunk 1 text run 1 at (30.00,40.00) startOffset 0 endOffset 68 width 403.88: "Test animation options for specifying the target attribute/property."
-      RenderSVGContainer {g} at (20,128) size 407x89 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,50.00)}]
+      LayoutSVGContainer {g} at (20,128) size 407x89 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,50.00)}]
         LayoutSVGText {text} at (20,151) size 50x16 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 50x16
             chunk 1 text run 1 at (20.00,164.00) startOffset 0 endOffset 8 width 49.80: "0-3 sec."