Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/platform/linux/svg/custom/use-on-text-expected.txt

Index: LayoutTests/platform/linux/svg/custom/use-on-text-expected.txt
diff --git a/LayoutTests/platform/linux/svg/custom/use-on-text-expected.txt b/LayoutTests/platform/linux/svg/custom/use-on-text-expected.txt
index 8173f3601f3210f3808ec7eae86208c01ad366ac..c84000ee442129f35c1c092c61935f522fefb0bd 100644
--- a/LayoutTests/platform/linux/svg/custom/use-on-text-expected.txt
+++ b/LayoutTests/platform/linux/svg/custom/use-on-text-expected.txt
@@ -6,14 +6,14 @@ layer at (0,0) size 800x600
       LayoutSVGText {text} at (0,-26) size 70x46 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 70x45
           chunk 1 text run 1 at (0.00,10.00) startOffset 0 endOffset 4 width 69.50: "Test"
-    RenderSVGContainer {g} at (246,0) size 147x93 [transform={m=((1.00,0.00)(0.00,1.00)) t=(125.00,25.00)}]
+    LayoutSVGContainer {g} at (246,0) size 147x93 [transform={m=((1.00,0.00)(0.00,1.00)) t=(125.00,25.00)}]
       LayoutSVGText {text} at (0,-26) size 70x46 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 70x45
           chunk 1 text run 1 at (0.00,10.00) startOffset 0 endOffset 4 width 69.50: "Test"
     LayoutSVGText {text} at (10,46) size 241x18 contains 1 chunk(s)
       LayoutSVGInlineText {#text} at (0,0) size 241x18
         chunk 1 text run 1 at (10.00,60.00) startOffset 0 endOffset 38 width 240.50: "The two objects should look identical."
-    RenderSVGContainer {use} at (46,0) size 147x93 [transform={m=((1.00,0.00)(0.00,1.00)) t=(25.00,25.00)}]
+    LayoutSVGContainer {use} at (46,0) size 147x93 [transform={m=((1.00,0.00)(0.00,1.00)) t=(25.00,25.00)}]
       LayoutSVGText {text} at (0,-26) size 70x46 contains 1 chunk(s)
         LayoutSVGInlineText {#text} at (0,0) size 70x45
           chunk 1 text run 1 at (0.00,10.00) startOffset 0 endOffset 4 width 69.50: "Test"