Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/tables/mozilla/core/nested1-expected.txt

Index: LayoutTests/platform/linux/tables/mozilla/core/nested1-expected.txt
diff --git a/LayoutTests/platform/linux/tables/mozilla/core/nested1-expected.txt b/LayoutTests/platform/linux/tables/mozilla/core/nested1-expected.txt
index 07ac97da73a3ed5181ff0d12a45453fcf14e5b73..2c7a91e53d8ef758f0b39328b994e899a0009650 100644
--- a/LayoutTests/platform/linux/tables/mozilla/core/nested1-expected.txt
+++ b/LayoutTests/platform/linux/tables/mozilla/core/nested1-expected.txt
@@ -14,7 +14,7 @@ layer at (0,0) size 800x600
                       RenderText {#text} at (1,1) size 170x19
                         text run at (1,1) width 170: "nested in auto, width=100%"
       RenderBlock (anonymous) at (0,36) size 784x20
-        RenderBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
       LayoutTable {TABLE} at (0,56) size 200x36 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 198x34
           LayoutTableRow {TR} at (0,2) size 198x30
@@ -26,7 +26,7 @@ layer at (0,0) size 800x600
                       RenderText {#text} at (1,1) size 173x19
                         text run at (1,1) width 173: "nested in fixed, width=100%"
       RenderBlock (anonymous) at (0,92) size 784x20
-        RenderBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
       LayoutTable {TABLE} at (0,112) size 800x36 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 798x34
           LayoutTableRow {TR} at (0,2) size 798x30
@@ -38,7 +38,7 @@ layer at (0,0) size 800x600
                       RenderText {#text} at (1,1) size 173x19
                         text run at (1,1) width 173: "nested in fixed, width=100%"
       RenderBlock (anonymous) at (0,148) size 784x20
-        RenderBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
       LayoutTable {TABLE} at (0,168) size 218x36 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 216x34
           LayoutTableRow {TR} at (0,2) size 216x30
@@ -53,7 +53,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 26x19
                 text run at (2,2) width 26: "auto"
       RenderBlock (anonymous) at (0,204) size 784x20
-        RenderBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
       LayoutTable {TABLE} at (0,224) size 784x36 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 782x34
           LayoutTableRow {TR} at (0,2) size 782x30
@@ -68,7 +68,7 @@ layer at (0,0) size 800x600
               RenderText {#text} at (2,2) size 20x19
                 text run at (2,2) width 20: "foo"
       RenderBlock (anonymous) at (0,260) size 784x20
-        RenderBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
       LayoutTable {TABLE} at (0,280) size 784x42 [border: (1px outset #808080)]
         LayoutTableSection {TBODY} at (1,1) size 782x40
           LayoutTableRow {TR} at (0,2) size 782x36