Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/mac/svg/text/scaled-font-expected.txt

Index: LayoutTests/platform/mac/svg/text/scaled-font-expected.txt
diff --git a/LayoutTests/platform/mac/svg/text/scaled-font-expected.txt b/LayoutTests/platform/mac/svg/text/scaled-font-expected.txt
index 4616f09d522e7a746f14ff9b2192dc770c618b05..35e23cbc0d9bef1de8165e7822b7d57f7658c8e7 100644
--- a/LayoutTests/platform/mac/svg/text/scaled-font-expected.txt
+++ b/LayoutTests/platform/mac/svg/text/scaled-font-expected.txt
@@ -2,8 +2,8 @@ layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,187) size 494x333
-    RenderSVGContainer {g} at (0,187) size 494x333
-      RenderSVGContainer {g} at (0,187) size 493x138 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,70.00)}]
+    LayoutSVGContainer {g} at (0,187) size 494x333
+      LayoutSVGContainer {g} at (0,187) size 493x138 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,70.00)}]
         LayoutSVGText {text} at (0,-39) size 178x50 contains 1 chunk(s)
           RenderSVGTSpan {tspan} at (0,0) size 10x16
             LayoutSVGInlineText {#text} at (0,26) size 10x16
@@ -44,7 +44,7 @@ layer at (0,0) size 800x600
             LayoutSVGInlineText {#text} at (146,0) size 31x50
               chunk 1 text run 1 at (146.57,0.00) startOffset 0 endOffset 1 width 30.81: "A"
           LayoutSVGInlineText {#text} at (0,0) size 0x0
-      RenderSVGContainer {g} at (0,381) size 494x139 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,140.00)}]
+      LayoutSVGContainer {g} at (0,381) size 494x139 [transform={m=((1.00,0.00)(0.00,1.00)) t=(0.00,140.00)}]
         LayoutSVGText {text} at (0,-4) size 18x6 contains 1 chunk(s)
           RenderSVGTSpan {tspan} at (0,0) size 1x3
             LayoutSVGInlineText {#text} at (0,2) size 1x2