Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/fast/forms/search/search-appearance-basic-expected.txt

Index: LayoutTests/platform/mac/fast/forms/search/search-appearance-basic-expected.txt
diff --git a/LayoutTests/platform/mac/fast/forms/search/search-appearance-basic-expected.txt b/LayoutTests/platform/mac/fast/forms/search/search-appearance-basic-expected.txt
index cb7313aa38b5adcddab72d5bdff57ac2d05d34ad..d29a783f190878343180525ce163c3cd2c96e081 100644
--- a/LayoutTests/platform/mac/fast/forms/search/search-appearance-basic-expected.txt
+++ b/LayoutTests/platform/mac/fast/forms/search/search-appearance-basic-expected.txt
@@ -15,7 +15,7 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (0,6.50) size 5x0
             RenderBlock {DIV} at (5,0) size 100x13
             RenderBlock {DIV} at (106,1) size 11x11
-        RenderBR {BR} at (270,4) size 0x18
+        LayoutBR {BR} at (270,4) size 0x18
         LayoutTextControl {INPUT} at (4,31) size 125x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (4,3) size 117x13
             RenderBlock {DIV} at (0,6.50) size 5x0
@@ -28,7 +28,7 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (5,0) size 100x13
         RenderText {#text} at (270,31) size 4x18
           text run at (270,31) width 4: " "
-        RenderBR {BR} at (274,31) size 0x18
+        LayoutBR {BR} at (274,31) size 0x18
         LayoutTextControl {INPUT} at (4,58) size 125x21 [bgcolor=#FFFFFF] [border: (3px solid #00FF00)]
           RenderFlexibleBox {DIV} at (4,4) size 117x13
             RenderBlock {DIV} at (0,6.50) size 5x0
@@ -41,7 +41,7 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (5,0) size 100x13
         RenderText {#text} at (268,59) size 4x18
           text run at (268,59) width 4: " "
-        RenderBR {BR} at (272,59) size 0x18
+        LayoutBR {BR} at (272,59) size 0x18
       RenderBlock {DIV} at (0,83) size 163x45 [bgcolor=#888888]
         LayoutTextControl {INPUT} at (11,9) size 133x19 [bgcolor=#00FF00] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (3,3) size 127x13
@@ -55,14 +55,14 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (5,0) size 100x13
         RenderText {#text} at (131,4) size 4x18
           text run at (131,4) width 4: " "
-        RenderBR {BR} at (135,4) size 0x18
+        LayoutBR {BR} at (135,4) size 0x18
         LayoutTextControl {INPUT} at (4,31) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (3,3) size 117x13
             RenderBlock {DIV} at (0,6.50) size 5x0
             RenderBlock {DIV} at (5,0) size 100x13
         RenderText {#text} at (131,31) size 4x18
           text run at (131,31) width 4: " "
-        RenderBR {BR} at (135,31) size 0x18
+        LayoutBR {BR} at (135,31) size 0x18
         LayoutTextControl {INPUT} at (4,58) size 150x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (5,3) size 140x16
             RenderBlock {DIV} at (0,8) size 6x0
@@ -81,7 +81,7 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (6,0) size 119x16
         RenderText {#text} at (482,60) size 4x18
           text run at (482,60) width 4: " "
-        RenderBR {BR} at (486,60) size 0x18
+        LayoutBR {BR} at (486,60) size 0x18
         LayoutTextControl {INPUT} at (6,99) size 174x28 [bgcolor=#FFFFFF] [border: (3px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (4.50,4.50) size 165x19
             RenderBlock {DIV} at (0,9.50) size 5x0
@@ -94,7 +94,7 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (5,0) size 204x26
         RenderText {#text} at (451,105) size 4x18
           text run at (451,105) width 4: " "
-        RenderBR {BR} at (455,105) size 0x18
+        LayoutBR {BR} at (455,105) size 0x18
         LayoutTextControl {INPUT} at (6,153) size 174x28 [bgcolor=#FFFFFF] [border: (3px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (4.50,4.50) size 165x19
             RenderBlock {DIV} at (0,0) size 24x19
@@ -107,7 +107,7 @@ layer at (0,0) size 800x365
             RenderBlock {DIV} at (32,0) size 177x26
         RenderText {#text} at (451,159) size 4x18
           text run at (451,159) width 4: " "
-        RenderBR {BR} at (455,159) size 0x18
+        LayoutBR {BR} at (455,159) size 0x18
         LayoutTextControl {INPUT} at (4,196) size 166x21 [bgcolor=#FFFFFF] [border: (1px solid #BDC7D8)]
           RenderFlexibleBox {DIV} at (18,4) size 144x13
             RenderBlock {DIV} at (0,0) size 16x13