Move and rename RenderBR to LayoutBR.

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

Index: LayoutTests/platform/linux/fast/forms/search/search-appearance-basic-expected.txt
diff --git a/LayoutTests/platform/linux/fast/forms/search/search-appearance-basic-expected.txt b/LayoutTests/platform/linux/fast/forms/search/search-appearance-basic-expected.txt
index 1347e47cf291f165f0d4a38a246100e0dda6d5d9..e3c43ed3a8152faae8af59e628ee861238bcd564 100644
--- a/LayoutTests/platform/linux/fast/forms/search/search-appearance-basic-expected.txt
+++ b/LayoutTests/platform/linux/fast/forms/search/search-appearance-basic-expected.txt
@@ -15,7 +15,7 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (0,2.50) size 1x11
             RenderBlock {DIV} at (1,0) size 136x16
             RenderBlock {DIV} at (138,3.50) size 9x9
-        RenderBR {BR} at (332,5) size 0x19
+        LayoutBR {BR} at (332,5) size 0x19
         LayoutTextControl {INPUT} at (4,34) size 156x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (3,3) size 150x16
             RenderBlock {DIV} at (0,2.50) size 1x11
@@ -28,7 +28,7 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (1,0) size 136x16
         RenderText {#text} at (332,35) size 4x19
           text run at (332,35) width 4: " "
-        RenderBR {BR} at (336,35) size 0x19
+        LayoutBR {BR} at (336,35) size 0x19
         LayoutTextControl {INPUT} at (4,64) size 158x24 [bgcolor=#FFFFFF] [border: (3px solid #00FF00)]
           RenderFlexibleBox {DIV} at (4,4) size 150x16
             RenderBlock {DIV} at (0,2.50) size 1x11
@@ -41,7 +41,7 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (1,0) size 136x16
         RenderText {#text} at (334,66) size 4x19
           text run at (334,66) width 4: " "
-        RenderBR {BR} at (338,66) size 0x19
+        LayoutBR {BR} at (338,66) size 0x19
       RenderBlock {DIV} at (0,92) size 163x45 [bgcolor=#888888]
         LayoutTextControl {INPUT} at (11,9) size 133x22 [bgcolor=#00FF00] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (3,3) size 127x16
@@ -55,14 +55,14 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (1,0) size 136x16
         RenderText {#text} at (164,5) size 4x19
           text run at (164,5) width 4: " "
-        RenderBR {BR} at (168,5) size 0x19
+        LayoutBR {BR} at (168,5) size 0x19
         LayoutTextControl {INPUT} at (4,34) size 156x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (3,3) size 150x16
             RenderBlock {DIV} at (0,2.50) size 1x11
             RenderBlock {DIV} at (1,0) size 136x16
         RenderText {#text} at (164,35) size 4x19
           text run at (164,35) width 4: " "
-        RenderBR {BR} at (168,35) size 0x19
+        LayoutBR {BR} at (168,35) size 0x19
         LayoutTextControl {INPUT} at (4,70) size 182x25 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (3,3) size 176x19
             RenderBlock {DIV} at (0,4) size 1x11
@@ -81,7 +81,7 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (1,0) size 252x28
         RenderText {#text} at (725,73) size 4x19
           text run at (725,73) width 4: " "
-        RenderBR {BR} at (729,73) size 0x19
+        LayoutBR {BR} at (729,73) size 0x19
         LayoutTextControl {INPUT} at (6,119) size 234x33 [bgcolor=#FFFFFF] [border: (3px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (4.50,4.50) size 225x24
             RenderBlock {DIV} at (0,6.50) size 1x11
@@ -94,7 +94,7 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (1,0) size 272x33
         RenderText {#text} at (578,127) size 4x19
           text run at (578,127) width 4: " "
-        RenderBR {BR} at (582,127) size 0x19
+        LayoutBR {BR} at (582,127) size 0x19
         LayoutTextControl {INPUT} at (6,180) size 234x33 [bgcolor=#FFFFFF] [border: (3px inset #EEEEEE)]
           RenderFlexibleBox {DIV} at (4.50,4.50) size 225x24
             RenderBlock {DIV} at (3,2) size 20x20
@@ -107,7 +107,7 @@ layer at (0,0) size 800x406
             RenderBlock {DIV} at (37,0) size 236x33
         RenderText {#text} at (578,188) size 4x19
           text run at (578,188) width 4: " "
-        RenderBR {BR} at (582,188) size 0x19
+        LayoutBR {BR} at (582,188) size 0x19
         LayoutTextControl {INPUT} at (4,228) size 152x21 [bgcolor=#FFFFFF] [border: (1px solid #BDC7D8)]
           RenderFlexibleBox {DIV} at (18,4) size 130x13
             RenderBlock {DIV} at (2,1) size 11x11