Move and rename RenderBR to LayoutBR.

LayoutTests/platform/win/fast/forms/select-baseline-expected.txt

Index: LayoutTests/platform/win/fast/forms/select-baseline-expected.txt
diff --git a/LayoutTests/platform/win/fast/forms/select-baseline-expected.txt b/LayoutTests/platform/win/fast/forms/select-baseline-expected.txt
index e4cc1862a8fe8b1e977ff7e014f3c78fa17ae4ac..1500d607b5b2b804b02889aab91945babe135d24 100644
--- a/LayoutTests/platform/win/fast/forms/select-baseline-expected.txt
+++ b/LayoutTests/platform/win/fast/forms/select-baseline-expected.txt
@@ -5,10 +5,10 @@ layer at (0,0) size 800x600
     RenderBody {BODY} at (8,8) size 784x584
       RenderText {#text} at (0,0) size 474x17
         text run at (0,0) width 474: "This tests that empty select controls and buttons have the correct baseline."
-      RenderBR {BR} at (473,14) size 1x0
+      LayoutBR {BR} at (473,14) size 1x0
       RenderMenuList {SELECT} at (0,19) size 25x20 [bgcolor=#FFFFFF] [border: (1px solid #A9A9A9)]
         RenderBlock (anonymous) at (1,1) size 23x18
-          RenderBR at (4,1) size 0x16 [bgcolor=#FFFFFF]
+          LayoutBR at (4,1) size 0x16 [bgcolor=#FFFFFF]
       RenderText {#text} at (25,20) size 31x17
         text run at (25,20) width 31: " test "
       RenderMenuList {SELECT} at (55.22,19) size 47x20 [bgcolor=#FFFFFF] [border: (1px solid #A9A9A9)]
@@ -19,7 +19,7 @@ layer at (0,0) size 800x600
         text run at (102,20) width 5: " "
       RenderMenuList {SELECT} at (106.22,19) size 25x20 [color=#00008B] [bgcolor=#ADD8E6] [border: (1px solid #A9A9A9)]
         RenderBlock (anonymous) at (1,1) size 23x18
-          RenderBR at (4,1) size 0x16 [bgcolor=#ADD8E6]
+          LayoutBR at (4,1) size 0x16 [bgcolor=#ADD8E6]
       RenderText {#text} at (131,20) size 31x17
         text run at (131,20) width 31: " test "
       RenderMenuList {SELECT} at (161.44,19) size 47x20 [color=#00008B] [bgcolor=#ADD8E6] [border: (1px solid #A9A9A9)]