Move and rename RenderBR to LayoutBR.

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

Index: LayoutTests/platform/win/fast/forms/input-baseline-expected.txt
diff --git a/LayoutTests/platform/win/fast/forms/input-baseline-expected.txt b/LayoutTests/platform/win/fast/forms/input-baseline-expected.txt
index 657e7e23366dbb0e9234f6c7f84c669a30a8f1b0..da302abc05a8f48f977b18abbc4ff331bb2ff158 100644
--- a/LayoutTests/platform/win/fast/forms/input-baseline-expected.txt
+++ b/LayoutTests/platform/win/fast/forms/input-baseline-expected.txt
@@ -5,13 +5,13 @@ layer at (0,0) size 800x600
     RenderBody {BODY} at (8,8) size 784x584
       RenderText {#text} at (0,0) size 303x17
         text run at (0,0) width 303: "This tests that text fields get the right baseline. "
-      RenderBR {BR} at (302,14) size 1x0
-      RenderBR {BR} at (0,18) size 0x17
+      LayoutBR {BR} at (302,14) size 1x0
+      LayoutBR {BR} at (0,18) size 0x17
       LayoutTextControl {INPUT} at (0,36) size 173x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       RenderText {#text} at (173,38) size 435x17
         text run at (173,38) width 435: "This text should line up with the bottom of the text in the text field. "
-      RenderBR {BR} at (607,52) size 1x0
-      RenderBR {BR} at (0,58) size 0x17
+      LayoutBR {BR} at (607,52) size 1x0
+      LayoutBR {BR} at (0,58) size 0x17
       LayoutTextControl {INPUT} at (0,76) size 173x129 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       RenderText {#text} at (173,163) size 431x17
         text run at (173,163) width 431: "This text should line up with the bottom of the text in the text field."