Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/win/svg/custom/empty-clip-path-expected.txt

Index: LayoutTests/platform/win/svg/custom/empty-clip-path-expected.txt
diff --git a/LayoutTests/platform/win/svg/custom/empty-clip-path-expected.txt b/LayoutTests/platform/win/svg/custom/empty-clip-path-expected.txt
index 30835f60a4559cbc96c81bc96462bca460cfa2ba..2797830ef1a9e1cfd4c5a1783c22970c846082ca 100644
--- a/LayoutTests/platform/win/svg/custom/empty-clip-path-expected.txt
+++ b/LayoutTests/platform/win/svg/custom/empty-clip-path-expected.txt
@@ -7,13 +7,13 @@ layer at (0,0) size 800x600
       LayoutSVGResourceClipper {clipPath} [id="emptyrect"] [clipPathUnits=userSpaceOnUse]
         RenderSVGRect {rect} at (0,0) size 0x0 [fill={[type=SOLID] [color=#000000]}] [x=0.00] [y=0.00] [width=0.00] [height=0.00]
     RenderSVGRect {rect} at (0,0) size 100x100 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-    RenderSVGContainer {g} at (0,0) size 0x0
+    LayoutSVGContainer {g} at (0,0) size 0x0
       [clipPath="nothing"] LayoutSVGResourceClipper {clipPath} at (0,0) size 0x0
       RenderSVGRect {rect} at (0,0) size 100x100 [fill={[type=SOLID] [color=#FF0000]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-    RenderSVGContainer {g} at (0,0) size 0x0
+    LayoutSVGContainer {g} at (0,0) size 0x0
       [clipPath="emptyrect"] LayoutSVGResourceClipper {clipPath} at (0,0) size 0x0
       RenderSVGRect {rect} at (0,0) size 100x100 [fill={[type=SOLID] [color=#FF0000]}] [x=0.00] [y=0.00] [width=100.00] [height=100.00]
-    RenderSVGContainer {g} at (0,116) size 463x37
+    LayoutSVGContainer {g} at (0,116) size 463x37
       LayoutSVGText {text} at (0,116) size 292x17 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 292x17
           chunk 1 text run 1 at (0.00,130.00) startOffset 0 endOffset 44 width 291.01: "Above a green rectangle should be displayed."