Move the SVG container code from rendering/svg to layout/svg.

LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt

Index: LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
diff --git a/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt b/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
index 613f8e0428c2cb01604454a7d916d097605673ff..3b5f139022fc50d8eed3dc1c2169b8a40368983c 100644
--- a/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
+++ b/LayoutTests/svg/custom/use-in-symbol-with-offset-expected.txt
@@ -2,21 +2,21 @@ layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 100x100
   RenderSVGRoot {svg} at (0,0) size 100x100
-    RenderSVGHiddenContainer {defs} at (0,0) size 0x0
-      RenderSVGHiddenContainer {symbol} at (0,0) size 0x0
+    LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {symbol} at (0,0) size 0x0
         LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
-      RenderSVGHiddenContainer {symbol} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {symbol} at (0,0) size 0x0
         LayoutSVGContainer {use} at (0,0) size 1x2
-          RenderSVGViewportContainer {svg} at (0,0) size 1x2
+          LayoutSVGViewportContainer {svg} at (0,0) size 1x2
             LayoutSVGRect {rect} at (0,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
         LayoutSVGContainer {use} at (1,0) size 1x2 [transform={m=((1.00,0.00)(0.00,1.00)) t=(1.00,0.00)}]
-          RenderSVGViewportContainer {svg} at (1,0) size 1x2
+          LayoutSVGViewportContainer {svg} at (1,0) size 1x2
             LayoutSVGRect {rect} at (1,0) size 1x2 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
     LayoutSVGContainer {use} at (0,0) size 100x100
-      RenderSVGViewportContainer {svg} at (0,0) size 100x100
+      LayoutSVGViewportContainer {svg} at (0,0) size 100x100
         LayoutSVGContainer {g} at (0,0) size 50x100
-          RenderSVGViewportContainer {svg} at (0,0) size 50x100
+          LayoutSVGViewportContainer {svg} at (0,0) size 50x100
             LayoutSVGRect {rect} at (0,0) size 50x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]
         LayoutSVGContainer {g} at (50,0) size 50x100 [transform={m=((1.00,0.00)(0.00,1.00)) t=(1.00,0.00)}]
-          RenderSVGViewportContainer {svg} at (50,0) size 50x100
+          LayoutSVGViewportContainer {svg} at (50,0) size 50x100
             LayoutSVGRect {rect} at (50,0) size 50x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=1.00] [height=2.00]