Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/svg/clip-path/clip-path-use-as-child2-expected.txt

Index: LayoutTests/svg/clip-path/clip-path-use-as-child2-expected.txt
diff --git a/LayoutTests/svg/clip-path/clip-path-use-as-child2-expected.txt b/LayoutTests/svg/clip-path/clip-path-use-as-child2-expected.txt
index 95329f649cb54fe4aafc70827b83035bdf8f258d..28cfc1d4e8fb9bddb0fd2a7373de5c822ce98329 100644
--- a/LayoutTests/svg/clip-path/clip-path-use-as-child2-expected.txt
+++ b/LayoutTests/svg/clip-path/clip-path-use-as-child2-expected.txt
@@ -5,7 +5,7 @@ layer at (0,0) size 800x600
     RenderSVGHiddenContainer {defs} at (0,0) size 0x0
       RenderSVGEllipse {circle} at (10,10) size 100x100 [fill={[type=SOLID] [color=#000000]}] [cx=60.00] [cy=60.00] [r=50.00]
       LayoutSVGResourceClipper {clipPath} [id="clip-circle"] [clipPathUnits=userSpaceOnUse]
-        RenderSVGContainer {use} at (10,10) size 100x100
+        LayoutSVGContainer {use} at (10,10) size 100x100
           RenderSVGEllipse {circle} at (10,10) size 100x100 [fill={[type=SOLID] [color=#000000]}] [cx=60.00] [cy=60.00] [r=50.00]
       LayoutSVGResourceClipper {clipPath} [id="clip-rect"] [clipPathUnits=userSpaceOnUse]
         RenderSVGRect {rect} at (10,30) size 100x60 [fill={[type=SOLID] [color=#000000]}] [x=10.00] [y=30.00] [width=100.00] [height=60.00]