Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/win/svg/W3C-SVG-1.1/masking-path-04-b-expected.txt

Index: LayoutTests/platform/win/svg/W3C-SVG-1.1/masking-path-04-b-expected.txt
diff --git a/LayoutTests/platform/win/svg/W3C-SVG-1.1/masking-path-04-b-expected.txt b/LayoutTests/platform/win/svg/W3C-SVG-1.1/masking-path-04-b-expected.txt
index 1aeea114b932600ba7f22809436195acbb8d7673..f5bec4246fc3f9a0123a9cc41780457f1406c944 100644
--- a/LayoutTests/platform/win/svg/W3C-SVG-1.1/masking-path-04-b-expected.txt
+++ b/LayoutTests/platform/win/svg/W3C-SVG-1.1/masking-path-04-b-expected.txt
@@ -2,18 +2,18 @@ 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 (30,20) size 410x271
+    LayoutSVGContainer {g} at (30,20) size 410x271
       RenderSVGHiddenContainer {defs} at (0,0) size 0x0
         LayoutSVGResourceClipper {clipPath} [id="sample"] [clipPathUnits=userSpaceOnUse]
           LayoutSVGText {text} at (45,169) size 355x122 contains 1 chunk(s)
             LayoutSVGInlineText {#text} at (0,0) size 355x122
               chunk 1 text run 1 at (45.00,270.00) startOffset 0 endOffset 9 width 354.44: "Clip Test"
-      RenderSVGContainer {g} at (30,20) size 410x140
+      LayoutSVGContainer {g} at (30,20) size 410x140
         RenderSVGImage {image} at (30,20) size 410x140
         LayoutSVGText {text} at (55,29) size 355x122 contains 1 chunk(s)
           LayoutSVGInlineText {#text} at (0,0) size 355x122
             chunk 1 text run 1 at (55.00,130.00) startOffset 0 endOffset 9 width 354.44: "Clip Test"
-      RenderSVGContainer {g} at (45,170) size 355x121
+      LayoutSVGContainer {g} at (45,170) size 355x121
         RenderSVGImage {image} at (45,170) size 355x121
           [clipPath="sample"] LayoutSVGResourceClipper {clipPath} at (45,168.83) size 354.44x121.83
     LayoutSVGText {text} at (10,304) size 264x45 contains 1 chunk(s)