Move and rename RenderBR to LayoutBR.

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

Index: LayoutTests/platform/mac/tables/mozilla/core/col_widths_fix_fix-expected.txt
diff --git a/LayoutTests/platform/mac/tables/mozilla/core/col_widths_fix_fix-expected.txt b/LayoutTests/platform/mac/tables/mozilla/core/col_widths_fix_fix-expected.txt
index bfbdb10266edcc56ec03cc82005105d32ba785fb..0400e325be7a6b2348242893251222a98258d49e 100644
--- a/LayoutTests/platform/mac/tables/mozilla/core/col_widths_fix_fix-expected.txt
+++ b/LayoutTests/platform/mac/tables/mozilla/core/col_widths_fix_fix-expected.txt
@@ -13,7 +13,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 64x18
                 text run at (2,2) width 64: "one_hund"
       RenderBlock (anonymous) at (0,28) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,46) size 500x28 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 498x26
           LayoutTableRow {TR} at (0,2) size 498x22
@@ -27,7 +27,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 98x18
                 text run at (2,2) width 98: "foo foo foo foo"
       RenderBlock (anonymous) at (0,74) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       RenderBlock {HR} at (0,100) size 402x2 [border: (1px inset #EEEEEE)]
       RenderBlock (anonymous) at (0,110) size 784x18
         RenderText {#text} at (0,0) size 374x18
@@ -43,8 +43,8 @@ layer at (0,0) size 800x600
                 text run at (2,2) width 123: "foo foo foo foo foo"
                 text run at (2,20) width 72: "foo foo foo"
       RenderBlock (anonymous) at (0,174) size 784x54
-        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
         RenderText {#text} at (0,36) size 383x18
           text run at (0,36) width 383: "excess above min allocated based on fixed widths (not min)"
       LayoutTable {TABLE} at (0,228) size 100x46 [border: (1px outset #808080)]
@@ -58,7 +58,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 22x18
                 text run at (2,2) width 22: "foo"
       RenderBlock (anonymous) at (0,274) size 784x36
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
         RenderText {#text} at (0,18) size 383x18
           text run at (0,18) width 383: "excess above min allocated based on fixed widths (not min)"
       LayoutTable {TABLE} at (0,310) size 100x46 [border: (1px outset #808080)]
@@ -72,7 +72,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 22x18
                 text run at (2,2) width 22: "foo"
       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 600x28 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 598x26
           LayoutTableRow {TR} at (0,2) size 598x22
@@ -83,7 +83,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 22x18
                 text run at (2,2) width 22: "foo"
       RenderBlock (anonymous) at (0,402) size 784x18
-        RenderBR {BR} at (0,0) size 0x18
+        LayoutBR {BR} at (0,0) size 0x18
       LayoutTable {TABLE} at (0,420) size 40x28 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 38x26
           LayoutTableRow {TR} at (0,2) size 38x22