Move and rename RenderBR to LayoutBR.

LayoutTests/platform/win-xp/fast/forms/placeholder-position-expected.txt

Index: LayoutTests/platform/win-xp/fast/forms/placeholder-position-expected.txt
diff --git a/LayoutTests/platform/win-xp/fast/forms/placeholder-position-expected.txt b/LayoutTests/platform/win-xp/fast/forms/placeholder-position-expected.txt
index 0faf99be4b801668edeae726b8fc5a79f9524172..3639d6b6dfe49f529b91df5612738257da6d4a67 100644
--- a/LayoutTests/platform/win-xp/fast/forms/placeholder-position-expected.txt
+++ b/LayoutTests/platform/win-xp/fast/forms/placeholder-position-expected.txt
@@ -7,32 +7,32 @@ layer at (0,0) size 800x600
         RenderFlexibleBox {DIV} at (3,3) size 149x16
           RenderBlock {DIV} at (0,2.50) size 1x11
           RenderBlock {DIV} at (1,0) size 135x16
-      RenderBR {BR} at (155,16) size 0x0
+      LayoutBR {BR} at (155,16) size 0x0
       LayoutTextControl {INPUT} at (0,22) size 153x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
-      RenderBR {BR} at (153,38) size 0x0
+      LayoutBR {BR} at (153,38) size 0x0
       LayoutTextControl {INPUT} at (0,44) size 155x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderFlexibleBox {DIV} at (3,3) size 149x16
           RenderBlock {DIV} at (0,2.50) size 1x11
           RenderBlock {DIV} at (1,0) size 135x16
-      RenderBR {BR} at (155,60) size 0x0
+      LayoutBR {BR} at (155,60) size 0x0
       LayoutTextControl {INPUT} at (0,66) size 155x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderFlexibleBox {DIV} at (3,3) size 149x16
           RenderBlock {DIV} at (2,1.50) size 13x13
           RenderBlock {DIV} at (18,0) size 118x16
-      RenderBR {BR} at (155,82) size 0x0
-      RenderBR {BR} at (179,124) size 0x0
+      LayoutBR {BR} at (155,82) size 0x0
+      LayoutBR {BR} at (179,124) size 0x0
       LayoutTextControl {INPUT} at (0,124) size 153x36 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
-      RenderBR {BR} at (153,140) size 0x0
-      RenderBR {BR} at (179,209) size 0x0
+      LayoutBR {BR} at (153,140) size 0x0
+      LayoutBR {BR} at (179,209) size 0x0
       LayoutTextControl {INPUT} at (5,214) size 183x29 [bgcolor=#FFFFFF] [border: (5px solid #000000)]
-      RenderBR {BR} at (193,234) size 0x0
+      LayoutBR {BR} at (193,234) size 0x0
       LayoutTextControl {INPUT} at (0,248) size 153x31 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       RenderText {#text} at (153,253) size 4x19
         text run at (153,253) width 4: " "
       LayoutTextControl {INPUT} at (157,248) size 153x31 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       RenderText {#text} at (310,253) size 4x19
         text run at (310,253) width 4: " "
-      RenderBR {BR} at (314,268) size 0x0
+      LayoutBR {BR} at (314,268) size 0x0
       LayoutTextControl {INPUT} at (0,279) size 153x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       RenderText {#text} at (153,280) size 4x19
         text run at (153,280) width 4: " "
@@ -42,8 +42,8 @@ layer at (0,0) size 800x600
       LayoutTextControl {INPUT} at (314,279) size 153x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       RenderText {#text} at (467,280) size 4x19
         text run at (467,280) width 4: " "
-      RenderBR {BR} at (471,295) size 0x0
-      RenderBR {BR} at (153,331) size 0x0
+      LayoutBR {BR} at (471,295) size 0x0
+      LayoutBR {BR} at (153,331) size 0x0
 layer at (12,11) size 135x16
   RenderBlock {DIV} at (4,3) size 135x16 [color=#A9A9A9]
     RenderText {#text} at (0,0) size 66x16