Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/fast/replaced/border-radius-clip-expected.txt

Index: LayoutTests/platform/linux/fast/replaced/border-radius-clip-expected.txt
diff --git a/LayoutTests/platform/linux/fast/replaced/border-radius-clip-expected.txt b/LayoutTests/platform/linux/fast/replaced/border-radius-clip-expected.txt
index 7ef4abdea3ff59f2fea0deeb0ffc0e711fc5f776..cdba31ad2c7a552d2d8c5539ad125396093c8ee7 100644
--- a/LayoutTests/platform/linux/fast/replaced/border-radius-clip-expected.txt
+++ b/LayoutTests/platform/linux/fast/replaced/border-radius-clip-expected.txt
@@ -5,21 +5,21 @@ layer at (0,0) size 785x934 backgroundClip at (0,0) size 785x600 clip at (0,0) s
     RenderBody {BODY} at (8,8) size 769x918
       RenderText {#text} at (0,0) size 440x19
         text run at (0,0) width 440: "All of the replaced elements below should be clipped to a border-radius. "
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       LayoutImage {IMG} at (0,20) size 100x100
       RenderText {#text} at (100,105) size 4x19
         text run at (100,105) width 4: " "
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       LayoutImage {INPUT} at (0,125) size 100x100
       RenderText {#text} at (100,210) size 4x19
         text run at (100,210) width 4: " "
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       RenderText {#text} at (304,369) size 4x19
         text run at (304,369) width 4: " "
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       RenderText {#text} at (300,524) size 4x19
         text run at (300,524) width 4: " "
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       RenderText {#text} at (0,0) size 0x0
 layer at (8,238) size 304x154
   LayoutIFrame {IFRAME} at (0,230) size 304x154 [border: (2px inset #EEEEEE)]