Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/svg/custom/linking-a-03-b-viewBox-transform-expected.txt

Index: LayoutTests/svg/custom/linking-a-03-b-viewBox-transform-expected.txt
diff --git a/LayoutTests/svg/custom/linking-a-03-b-viewBox-transform-expected.txt b/LayoutTests/svg/custom/linking-a-03-b-viewBox-transform-expected.txt
index e959556611f1d8bd46b5128bfeca989aa971179d..fc4d4cb0776664f9d021f6b9e75032f0a894f9fa 100644
--- a/LayoutTests/svg/custom/linking-a-03-b-viewBox-transform-expected.txt
+++ b/LayoutTests/svg/custom/linking-a-03-b-viewBox-transform-expected.txt
@@ -2,7 +2,7 @@ layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 480x360
   RenderSVGRoot {svg} at (0,0) size 480x360
-    RenderSVGContainer {g} at (0,0) size 480x360
+    LayoutSVGContainer {g} at (0,0) size 480x360
       LayoutSVGText {text} at (100,9) size 188x14 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 188x14
           chunk 1 text run 1 at (100.00,20.00) startOffset 0 endOffset 41 width 187.31: "Some circles with ids, for linking tests."
@@ -19,5 +19,5 @@ layer at (0,0) size 480x360
       LayoutSVGText {text} at (320,321) size 39x14 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 39x14
           chunk 1 text run 1 at (320.00,332.00) startOffset 0 endOffset 8 width 38.67: "circle-3"
-    RenderSVGContainer {g} at (0,0) size 480x360
+    LayoutSVGContainer {g} at (0,0) size 480x360
       RenderSVGRect {rect} at (0,0) size 480x360 [stroke={[type=SOLID] [color=#000000]}] [x=1.00] [y=1.00] [width=478.00] [height=358.00]