Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/fast/forms/textarea-scrolled-type-expected.txt

Index: LayoutTests/platform/mac/fast/forms/textarea-scrolled-type-expected.txt
diff --git a/LayoutTests/platform/mac/fast/forms/textarea-scrolled-type-expected.txt b/LayoutTests/platform/mac/fast/forms/textarea-scrolled-type-expected.txt
index 9f0fd449f5f8ca9ed9b0ae677616c6afaeebaa27..5d6f87421cedd22af2dc735a439c456e635802a3 100644
--- a/LayoutTests/platform/mac/fast/forms/textarea-scrolled-type-expected.txt
+++ b/LayoutTests/platform/mac/fast/forms/textarea-scrolled-type-expected.txt
@@ -6,73 +6,73 @@ layer at (0,0) size 800x600
       RenderBlock (anonymous) at (0,0) size 784x119
         RenderText {#text} at (0,0) size 515x18
           text run at (0,0) width 515: "This tests that typing in a scrolled textarea does not cause unnecessary scrolling."
-        RenderBR {BR} at (514,14) size 1x0
+        LayoutBR {BR} at (514,14) size 1x0
         RenderText {#text} at (161,101) size 4x18
           text run at (161,101) width 4: " "
-        RenderBR {BR} at (165,115) size 0x0
+        LayoutBR {BR} at (165,115) size 0x0
       RenderBlock {DIV} at (0,119) size 784x0
 layer at (8,26) size 161x97 clip at (9,27) size 144x95 scrollY 182.00 scrollHeight 277
   LayoutTextControl {TEXTAREA} at (0,18) size 161x97 [bgcolor=#FFFFFF] [border: (1px solid #000000)]
     RenderBlock {DIV} at (3,3) size 140x273
       RenderText {#text} at (0,0) size 7x13
         text run at (0,0) width 7: "1"
-      RenderBR {BR} at (6,11) size 1x0
+      LayoutBR {BR} at (6,11) size 1x0
       RenderText {#text} at (0,13) size 7x13
         text run at (0,13) width 7: "2"
-      RenderBR {BR} at (6,24) size 1x0
+      LayoutBR {BR} at (6,24) size 1x0
       RenderText {#text} at (0,26) size 7x13
         text run at (0,26) width 7: "3"
-      RenderBR {BR} at (6,37) size 1x0
+      LayoutBR {BR} at (6,37) size 1x0
       RenderText {#text} at (0,39) size 7x13
         text run at (0,39) width 7: "4"
-      RenderBR {BR} at (6,50) size 1x0
+      LayoutBR {BR} at (6,50) size 1x0
       RenderText {#text} at (0,52) size 7x13
         text run at (0,52) width 7: "5"
-      RenderBR {BR} at (6,63) size 1x0
+      LayoutBR {BR} at (6,63) size 1x0
       RenderText {#text} at (0,65) size 7x13
         text run at (0,65) width 7: "6"
-      RenderBR {BR} at (6,76) size 1x0
+      LayoutBR {BR} at (6,76) size 1x0
       RenderText {#text} at (0,78) size 7x13
         text run at (0,78) width 7: "7"
-      RenderBR {BR} at (6,89) size 1x0
+      LayoutBR {BR} at (6,89) size 1x0
       RenderText {#text} at (0,91) size 7x13
         text run at (0,91) width 7: "8"
-      RenderBR {BR} at (6,102) size 1x0
+      LayoutBR {BR} at (6,102) size 1x0
       RenderText {#text} at (0,104) size 7x13
         text run at (0,104) width 7: "9"
-      RenderBR {BR} at (6,115) size 1x0
+      LayoutBR {BR} at (6,115) size 1x0
       RenderText {#text} at (0,117) size 14x13
         text run at (0,117) width 14: "10"
-      RenderBR {BR} at (13,128) size 1x0
+      LayoutBR {BR} at (13,128) size 1x0
       RenderText {#text} at (0,130) size 14x13
         text run at (0,130) width 14: "11"
-      RenderBR {BR} at (13,141) size 1x0
+      LayoutBR {BR} at (13,141) size 1x0
       RenderText {#text} at (0,143) size 14x13
         text run at (0,143) width 14: "12"
-      RenderBR {BR} at (13,154) size 1x0
+      LayoutBR {BR} at (13,154) size 1x0
       RenderText {#text} at (0,156) size 14x13
         text run at (0,156) width 14: "13"
-      RenderBR {BR} at (13,167) size 1x0
+      LayoutBR {BR} at (13,167) size 1x0
       RenderText {#text} at (0,169) size 14x13
         text run at (0,169) width 14: "14"
-      RenderBR {BR} at (13,180) size 1x0
+      LayoutBR {BR} at (13,180) size 1x0
       RenderText {#text} at (0,182) size 14x13
         text run at (0,182) width 14: "15"
-      RenderBR {BR} at (13,193) size 1x0
+      LayoutBR {BR} at (13,193) size 1x0
       RenderText {#text} at (0,195) size 14x13
         text run at (0,195) width 14: "16"
-      RenderBR {BR} at (13,206) size 1x0
+      LayoutBR {BR} at (13,206) size 1x0
       RenderText {#text} at (0,208) size 14x13
         text run at (0,208) width 14: "17"
-      RenderBR {BR} at (13,219) size 1x0
+      LayoutBR {BR} at (13,219) size 1x0
       RenderText {#text} at (0,221) size 41x13
         text run at (0,221) width 41: "18 Pass"
-      RenderBR {BR} at (40,232) size 1x0
+      LayoutBR {BR} at (40,232) size 1x0
       RenderText {#text} at (0,234) size 14x13
         text run at (0,234) width 14: "19"
-      RenderBR {BR} at (13,245) size 1x0
+      LayoutBR {BR} at (13,245) size 1x0
       RenderText {#text} at (0,247) size 14x13
         text run at (0,247) width 14: "20"
-      RenderBR {BR} at (13,258) size 1x0
-      RenderBR {BR} at (0,260) size 0x13
+      LayoutBR {BR} at (13,258) size 1x0
+      LayoutBR {BR} at (0,260) size 0x13
 caret: position 7 of child 34 {#text} of child 0 {DIV} of {#document-fragment} of child 3 {TEXTAREA} of body