Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/tables/mozilla/bugs/bug16012-expected.txt

Index: LayoutTests/platform/linux/tables/mozilla/bugs/bug16012-expected.txt
diff --git a/LayoutTests/platform/linux/tables/mozilla/bugs/bug16012-expected.txt b/LayoutTests/platform/linux/tables/mozilla/bugs/bug16012-expected.txt
index e46ea7579cf83594570171f39abb00d7b2687191..225f3d618edb858444967f3b6eda147b577f675e 100644
--- a/LayoutTests/platform/linux/tables/mozilla/bugs/bug16012-expected.txt
+++ b/LayoutTests/platform/linux/tables/mozilla/bugs/bug16012-expected.txt
@@ -6,8 +6,8 @@ layer at (0,0) size 800x600
       RenderBlock (anonymous) at (0,0) size 784x40
         RenderText {#text} at (0,0) size 247x19
           text run at (0,0) width 247: "Tables: both lines should be 1 pixel thick."
-        RenderBR {BR} at (247,15) size 0x0
-        RenderBR {BR} at (0,20) size 0x19
+        LayoutBR {BR} at (247,15) size 0x0
+        LayoutBR {BR} at (0,20) size 0x19
       LayoutTable {TABLE} at (0,40) size 37x5
         LayoutTableSection {TBODY} at (0,0) size 37x5
           LayoutTableRow {TR} at (0,2) size 37x1
@@ -15,34 +15,34 @@ layer at (0,0) size 800x600
               LayoutImage {IMG} at (0,0) size 30x1
             LayoutTableCell {TD} at (35,2) size 0x0 [r=0 c=1 rs=1 cs=1]
       RenderBlock (anonymous) at (0,45) size 784x20
-        RenderBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
       LayoutTable {TABLE} at (0,65) size 34x5
         LayoutTableSection {TBODY} at (0,0) size 34x5
           LayoutTableRow {TR} at (0,2) size 34x1
             LayoutTableCell {TD} at (2,2) size 30x1 [bgcolor=#FF0000] [r=0 c=0 rs=1 cs=1]
               LayoutImage {IMG} at (0,0) size 30x1
       RenderBlock (anonymous) at (0,70) size 784x192
-        RenderBR {BR} at (0,0) size 0x19
-        RenderBR {BR} at (0,20) size 0x19
-        RenderBR {BR} at (0,40) size 0x19
+        LayoutBR {BR} at (0,0) size 0x19
+        LayoutBR {BR} at (0,20) size 0x19
+        LayoutBR {BR} at (0,40) size 0x19
         RenderText {#text} at (0,60) size 379x19
           text run at (0,60) width 208: "2 texts, FACE=\"Arial, Helvetica\", "
           text run at (208,60) width 171: "1st at size=0, 2nd at size=-4"
-        RenderBR {BR} at (379,75) size 0x0
-        RenderBR {BR} at (0,80) size 0x19
+        LayoutBR {BR} at (379,75) size 0x0
+        LayoutBR {BR} at (0,80) size 0x19
         RenderInline {FONT} at (0,0) size 104x26
           RenderText {#text} at (0,100) size 104x13
             text run at (0,100) width 104: "Detonator 3.53 Drivers"
-          RenderBR {BR} at (104,110) size 0x0
+          LayoutBR {BR} at (104,110) size 0x0
           RenderText {#text} at (0,113) size 78x13
             text run at (0,113) width 78: "Available NOW! "
-        RenderBR {BR} at (78,123) size 0x0
-        RenderBR {BR} at (0,126) size 0x19
+        LayoutBR {BR} at (78,123) size 0x0
+        LayoutBR {BR} at (0,126) size 0x19
         RenderInline {FONT} at (0,0) size 104x26
           RenderText {#text} at (0,146) size 104x13
             text run at (0,146) width 104: "Detonator 3.53 Drivers"
-          RenderBR {BR} at (104,156) size 0x0
+          LayoutBR {BR} at (104,156) size 0x0
           RenderText {#text} at (0,159) size 78x13
             text run at (0,159) width 78: "Available NOW! "
-        RenderBR {BR} at (78,169) size 0x0
-        RenderBR {BR} at (0,172) size 0x19
+        LayoutBR {BR} at (78,169) size 0x0
+        LayoutBR {BR} at (0,172) size 0x19