Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/fast/table/009-expected.txt

Index: LayoutTests/platform/mac/fast/table/009-expected.txt
diff --git a/LayoutTests/platform/mac/fast/table/009-expected.txt b/LayoutTests/platform/mac/fast/table/009-expected.txt
index e046bed7493754c334906bd1ec6f4d8e01eed2ab..c9e177f9fe84d7080741aeda7bc36e9ccbd3e62f 100644
--- a/LayoutTests/platform/mac/fast/table/009-expected.txt
+++ b/LayoutTests/platform/mac/fast/table/009-expected.txt
@@ -25,18 +25,18 @@ layer at (0,0) size 800x600
           text run at (2,20) width 32: "text. "
           text run at (33,20) width 53: "I should"
           text run at (2,38) width 62: "overflow."
-        RenderBR {BR} at (63,52) size 1x0
+        LayoutBR {BR} at (63,52) size 1x0
         RenderText {#text} at (2,56) size 100x18
           text run at (2,56) width 100: "I will overflow."
-        RenderBR {BR} at (101,70) size 1x0
+        LayoutBR {BR} at (101,70) size 1x0
         RenderText {#text} at (2,74) size 100x36
           text run at (2,74) width 100: "I definitely will"
           text run at (2,92) width 58: "overflow"
-        RenderBR {BR} at (59,106) size 1x0
+        LayoutBR {BR} at (59,106) size 1x0
         RenderText {#text} at (2,110) size 68x36
           text run at (2,110) width 68: "I promis. I"
           text run at (2,128) width 67: "lvoerflow."
-        RenderBR {BR} at (68,142) size 1x0
+        LayoutBR {BR} at (68,142) size 1x0
         RenderText {#text} at (2,146) size 46x18
           text run at (2,146) width 46: "Really."
       RenderBlock {P} at (0,74) size 800x0