Move RenderSVGContainer to layout/svg/LayoutSVGContainer.

LayoutTests/svg/filters/filter-hidden-content-expected.txt

Index: LayoutTests/svg/filters/filter-hidden-content-expected.txt
diff --git a/LayoutTests/svg/filters/filter-hidden-content-expected.txt b/LayoutTests/svg/filters/filter-hidden-content-expected.txt
index 5e1121948bb310ce8d72c1ed61330ac1a79b9ea2..642ce8bf5fe3ed69ce4cc0cbc0c4d708d2ed4a22 100644
--- a/LayoutTests/svg/filters/filter-hidden-content-expected.txt
+++ b/LayoutTests/svg/filters/filter-hidden-content-expected.txt
@@ -6,11 +6,11 @@ layer at (0,0) size 400x400
       LayoutSVGResourceFilter {filter} [id="f1"] [filterUnits=objectBoundingBox] [primitiveUnits=userSpaceOnUse]
         [feGaussianBlur stdDeviation="0.00, 0.00"]
           [SourceGraphic]
-    RenderSVGContainer {g} at (0,0) size 275x55
+    LayoutSVGContainer {g} at (0,0) size 275x55
       [filter="f1"] LayoutSVGResourceFilter {filter} at (-25,-5) size 300x60
       RenderSVGRect {rect} at (0,0) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=50.00] [height=50.00]
       RenderSVGRect {rect} at (200,0) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=200.00] [y=0.00] [width=50.00] [height=50.00]
-    RenderSVGContainer {g} at (125,145) size 275x60 [transform={m=((1.00,0.00)(0.00,1.00)) t=(150.00,150.00)}]
+    LayoutSVGContainer {g} at (125,145) size 275x60 [transform={m=((1.00,0.00)(0.00,1.00)) t=(150.00,150.00)}]
       [filter="f1"] LayoutSVGResourceFilter {filter} at (-25,-5) size 300x60
       RenderSVGRect {rect} at (150,150) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=0.00] [y=0.00] [width=50.00] [height=50.00]
       RenderSVGRect {rect} at (350,150) size 50x50 [fill={[type=SOLID] [color=#008000]}] [x=200.00] [y=0.00] [width=50.00] [height=50.00]