Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/win/svg/text/text-text-03-b-expected.txt

Index: LayoutTests/platform/win/svg/text/text-text-03-b-expected.txt
diff --git a/LayoutTests/platform/win/svg/text/text-text-03-b-expected.txt b/LayoutTests/platform/win/svg/text/text-text-03-b-expected.txt
index b26919086eb395362e4a181b3ccfd9f52a628b1c..c2a6e3d246508692083c1f52cb9fc602955e32e3 100644
--- a/LayoutTests/platform/win/svg/text/text-text-03-b-expected.txt
+++ b/LayoutTests/platform/win/svg/text/text-text-03-b-expected.txt
@@ -2,7 +2,7 @@ layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderSVGRoot {svg} at (0,0) size 800x600
-    RenderSVGContainer {g} at (1,45) size 787x439
+    LayoutSVGContainer {g} at (1,45) size 787x439
       LayoutSVGText {text} at (19,28) size 77x40 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 77x39
           chunk 1 text run 1 at (19.00,61.00) startOffset 0 endOffset 5 width 76.32: "Plain"
@@ -21,9 +21,9 @@ layer at (0,0) size 800x600
       LayoutSVGText {text} at (1,167) size 472x40 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 472x39
           chunk 1 text run 1 at (1.00,200.00) startOffset 0 endOffset 27 width 471.53: "Bold, italic and underlined"
-      RenderSVGContainer {g} at (81,372) size 638x112
+      LayoutSVGContainer {g} at (81,372) size 638x112
         RenderSVGRect {rect} at (81,373) size 638x111 [stroke={[type=SOLID] [color=#000000] [stroke width=2.00]}] [x=50.00] [y=225.00] [width=380.00] [height=64.00]
-        RenderSVGContainer {g} at (91,372) size 586x112
+        LayoutSVGContainer {g} at (91,372) size 586x112
           LayoutSVGText {text} at (55,223) size 346x27 contains 1 chunk(s)
             LayoutSVGInlineText {#text} at (0,0) size 346x27
               chunk 1 text run 1 at (55.00,245.00) startOffset 0 endOffset 34 width 345.50: "Each line of text which flows in a"