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

LayoutTests/platform/linux/svg/transforms/svg-css-transforms-clip-path-expected.txt

Index: LayoutTests/platform/linux/svg/transforms/svg-css-transforms-clip-path-expected.txt
diff --git a/LayoutTests/platform/linux/svg/transforms/svg-css-transforms-clip-path-expected.txt b/LayoutTests/platform/linux/svg/transforms/svg-css-transforms-clip-path-expected.txt
index 3972735e6dc08308041be6f3af566e54095768b4..fdf77595e1007009e001706d988aef3c36dc09ce 100644
--- a/LayoutTests/platform/linux/svg/transforms/svg-css-transforms-clip-path-expected.txt
+++ b/LayoutTests/platform/linux/svg/transforms/svg-css-transforms-clip-path-expected.txt
@@ -23,7 +23,7 @@ layer at (0,0) size 800x579
 layer at (28,85) size 200x200
   RenderBlock (relative positioned) {div} at (10,66.81) size 200x200 [bgcolor=#C0C0C0] [border: (1px solid #000000)]
     RenderSVGRoot {svg} at (39,95) size 140x141
-      RenderSVGHiddenContainer {defs} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
         LayoutSVGEllipse {circle} at (29,85) size 150x151 [transform={m=((5.00,0.00)(0.00,5.00)) t=(0.00,0.00)}] [fill={[type=SOLID] [color=#000000]}] [cx=10.00] [cy=10.00] [r=20.00]
         LayoutSVGResourceClipper {clipPath} [id="clip-circle1"] [clipPathUnits=userSpaceOnUse]
           LayoutSVGContainer {use} at (29,85) size 150x151
@@ -34,7 +34,7 @@ layer at (28,85) size 200x200
 layer at (28,352) size 200x200
   RenderBlock (relative positioned) {div} at (10,333.63) size 200x200 [bgcolor=#C0C0C0] [border: (1px solid #000000)]
     RenderSVGRoot {svg} at (39,362) size 140x141
-      RenderSVGHiddenContainer {defs} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
         LayoutSVGEllipse {circle} at (29,352) size 150x151 [transform={m=((5.00,0.00)(0.00,5.00)) t=(0.00,0.00)}] [fill={[type=SOLID] [color=#000000]}] [cx=10.00] [cy=10.00] [r=20.00]
         LayoutSVGResourceClipper {clipPath} [id="clip-circle2"] [clipPathUnits=userSpaceOnUse]
           LayoutSVGContainer {use} at (29,352) size 150x151
@@ -45,7 +45,7 @@ layer at (28,352) size 200x200
 layer at (272,85) size 200x200
   RenderBlock (relative positioned) {div} at (10,66.81) size 200x200 [bgcolor=#C0C0C0] [border: (1px solid #000000)]
     RenderSVGRoot {svg} at (283,95) size 132x189
-      RenderSVGHiddenContainer {defs} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
         LayoutSVGRect {rect} at (273,92) size 142x192 [transform={m=((3.54,3.54)(-3.54,3.54)) t=(0.00,0.00)}] [fill={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=40.00] [height=40.00]
         LayoutSVGResourceClipper {clipPath} [id="clip-rect1"] [clipPathUnits=userSpaceOnUse]
           LayoutSVGContainer {use} at (273,92) size 142x192
@@ -56,7 +56,7 @@ layer at (272,85) size 200x200
 layer at (272,352) size 200x200
   RenderBlock (relative positioned) {div} at (10,333.63) size 200x200 [bgcolor=#C0C0C0] [border: (1px solid #000000)]
     RenderSVGRoot {svg} at (283,362) size 132x189
-      RenderSVGHiddenContainer {defs} at (0,0) size 0x0
+      LayoutSVGHiddenContainer {defs} at (0,0) size 0x0
         LayoutSVGRect {rect} at (273,359) size 142x192 [transform={m=((3.54,3.54)(-3.54,3.54)) t=(0.00,0.00)}] [fill={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=40.00] [height=40.00]
         LayoutSVGResourceClipper {clipPath} [id="clip-rect2"] [clipPathUnits=userSpaceOnUse]
           LayoutSVGContainer {use} at (273,359) size 142x192