Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/tables/mozilla/core/col_span-expected.txt

Index: LayoutTests/platform/mac/tables/mozilla/core/col_span-expected.txt
diff --git a/LayoutTests/platform/mac/tables/mozilla/core/col_span-expected.txt b/LayoutTests/platform/mac/tables/mozilla/core/col_span-expected.txt
index 6155fdf3a570cfabd0bd6875f45264af88c8655e..49239d0b1a9d47f59d7c746fb0e608822a6b3ce6 100644
--- a/LayoutTests/platform/mac/tables/mozilla/core/col_span-expected.txt
+++ b/LayoutTests/platform/mac/tables/mozilla/core/col_span-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x600
                 text run at (2,2) width 30: "30%"
                 text run at (2,20) width 37: "width"
       RenderBlock (anonymous) at (0,46) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,64) size 216x46 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 214x44
           LayoutTableRow {TR} at (0,2) size 214x40
@@ -26,7 +26,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 70x18
                 text run at (2,2) width 70: "50% width"
       RenderBlock (anonymous) at (0,110) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,128) size 532x52 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 530x50
           LayoutTableRow {TR} at (0,2) size 530x22
@@ -44,7 +44,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 94x18
                 text run at (2,2) width 94: "500 colspan=3"
       RenderBlock (anonymous) at (0,180) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,198) size 440x76 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 438x74
           LayoutTableRow {TR} at (0,2) size 438x22
@@ -72,7 +72,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 113x18
                 text run at (2,2) width 113: "300 spans col 2-3"
       RenderBlock (anonymous) at (0,274) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,292) size 700x64 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 698x62
           LayoutTableRow {TR} at (0,2) size 698x58
@@ -85,7 +85,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 21x18
                 text run at (2,2) width 21: "bar"
       RenderBlock (anonymous) at (0,356) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,374) size 400x90 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 398x88
           LayoutTableRow {TR} at (0,0) size 398x44
@@ -110,8 +110,8 @@ layer at (0,0) size 800x600
                   text run at (279,0) width 91: "blah blah blah"
                   text run at (0,18) width 217: "blah blah blah blah blah blah blah"
       RenderBlock (anonymous) at (0,464) size 784x36
-        RenderBR {BR} at (0,0) size 0x18
-        RenderBR {BR} at (0,18) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,18) size 0x18
       LayoutTable {TABLE} at (0,500) size 400x72 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 398x70
           LayoutTableRow {TR} at (0,0) size 398x26