Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/fast/block/float/float-avoidance-expected.txt

Index: LayoutTests/platform/linux/fast/block/float/float-avoidance-expected.txt
diff --git a/LayoutTests/platform/linux/fast/block/float/float-avoidance-expected.txt b/LayoutTests/platform/linux/fast/block/float/float-avoidance-expected.txt
index a39e4b6812b042418c0c22d117b2bbffee04b180..80aafea35b8a68e23dc78dc4b81e2cd57250fcda 100644
--- a/LayoutTests/platform/linux/fast/block/float/float-avoidance-expected.txt
+++ b/LayoutTests/platform/linux/fast/block/float/float-avoidance-expected.txt
@@ -15,7 +15,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {P} at (0,94) size 220x82 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
@@ -32,7 +32,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {P} at (0,228) size 220x62 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
@@ -43,7 +43,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
             RenderText {#text} at (36,0) size 12x16
               text run at (36,0) width 12: "Hi"
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (210,30) size 0x19
+        LayoutBR {BR} at (210,30) size 0x19
       RenderBlock (anonymous) at (0,306) size 769x20
         RenderText {#text} at (0,0) size 437x19
           text run at (0,0) width 437: "The block-level button with an auto width should be even with the select."
@@ -51,7 +51,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
@@ -62,7 +62,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
             RenderText {#text} at (0,0) size 12x16
               text run at (0,0) width 12: "Hi"
         RenderBlock (anonymous) at (10,52) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,440) size 769x20
         RenderText {#text} at (0,0) size 470x19
           text run at (0,0) width 470: "The block-level button with a percentage width should be even with the select."
@@ -70,7 +70,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
@@ -81,14 +81,14 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
             RenderText {#text} at (36,0) size 12x16
               text run at (36,0) width 12: "Hi"
         RenderBlock (anonymous) at (10,52) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,574) size 769x20
         RenderText {#text} at (0,0) size 437x19
           text run at (0,0) width 437: "The floating table with a percentage width should be even with the select."
       RenderBlock {P} at (0,610) size 220x72 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
@@ -101,7 +101,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
                 RenderText {#text} at (2,2) size 34x19
                   text run at (2,2) width 34: "Table"
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (210,30) size 0x19
+        LayoutBR {BR} at (210,30) size 0x19
       RenderBlock (anonymous) at (0,698) size 769x40
         RenderText {#text} at (0,0) size 711x39
           text run at (0,0) width 711: "The floating table with an auto width should be even with the select and shrinks to use the available line width. THIS IS"
@@ -109,7 +109,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {P} at (0,754) size 220x132 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
@@ -124,7 +124,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
                   text run at (2,22) width 154: "shrink so it can be next to"
                   text run at (2,42) width 85: "previous float."
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (110,30) size 0x19
+        LayoutBR {BR} at (110,30) size 0x19
       RenderBlock (anonymous) at (0,902) size 769x20
         RenderText {#text} at (0,0) size 695x19
           text run at (0,0) width 550: "The block-level table below has a percentage width and should still be even with the select. "
@@ -133,7 +133,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
@@ -148,7 +148,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
                   text run at (2,22) width 154: "shrink so it can be next to"
                   text run at (2,42) width 85: "previous float."
         RenderBlock (anonymous) at (10,122) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,1106) size 769x20
         RenderText {#text} at (0,0) size 705x19
           text run at (0,0) width 517: "The block-level table below has an auto width and should still be even with the select. "
@@ -157,7 +157,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
@@ -174,21 +174,21 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
                   text run at (2,62) width 85: "can be next to"
                   text run at (2,82) width 85: "previous float."
         RenderBlock (anonymous) at (10,142) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,1330) size 769x20
         RenderText {#text} at (0,0) size 507x19
           text run at (0,0) width 507: "The floating overflow section with a percentage width should be even with the select."
       RenderBlock {DIV} at (0,1350) size 220x140 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
               text run at (4,1) width 24: "One"
         RenderText {#text} at (0,0) size 0x0
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (210,30) size 0x19
+        LayoutBR {BR} at (210,30) size 0x19
       RenderBlock (anonymous) at (0,1490) size 769x40
         RenderText {#text} at (0,0) size 763x39
           text run at (0,0) width 763: "The floating overflow section with an auto width should be even with the select and shrinks to use the available line width. THIS"
@@ -196,14 +196,14 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {DIV} at (0,1530) size 220x120 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
               text run at (4,1) width 24: "One"
         RenderText {#text} at (0,0) size 0x0
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (110,30) size 0x19
+        LayoutBR {BR} at (110,30) size 0x19
       RenderBlock (anonymous) at (0,1650) size 769x20
         RenderText {#text} at (0,0) size 616x19
           text run at (0,0) width 616: "The block-level overflow section below has a percentage width and should still be even with the select."
@@ -211,14 +211,14 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
                 text run at (4,1) width 24: "One"
           RenderText {#text} at (0,0) size 0x0
         RenderBlock (anonymous) at (10,130) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,1830) size 769x40
         RenderText {#text} at (0,0) size 733x39
           text run at (0,0) width 587: "The block-level overflow section below has an auto width and should still be even with the select. "
@@ -228,21 +228,21 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
                 text run at (4,1) width 24: "One"
           RenderText {#text} at (0,0) size 0x0
         RenderBlock (anonymous) at (10,130) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,2030) size 769x20
         RenderText {#text} at (0,0) size 420x19
           text run at (0,0) width 420: "The floating hr with a percentage width should be even with the select."
       RenderBlock {DIV} at (0,2050) size 220x60 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
@@ -250,14 +250,14 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderText {#text} at (0,0) size 0x0
         RenderBlock (floating) {HR} at (112,32) size 82x2 [border: (1px inset #EEEEEE)]
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (196,30) size 0x19
+        LayoutBR {BR} at (196,30) size 0x19
       RenderBlock (anonymous) at (0,2110) size 769x20
         RenderText {#text} at (0,0) size 735x19
           text run at (0,0) width 735: "The floating hr below should still be even with the select and shrinks to use its intrinsic width (which is basically like 1-2px)."
       RenderBlock {DIV} at (0,2130) size 220x60 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 56x19
           text run at (10,10) width 56: "Line One"
-        RenderBR {BR} at (66,25) size 0x0
+        LayoutBR {BR} at (66,25) size 0x0
         RenderMenuList {SELECT} at (10,30) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
           RenderBlock (anonymous) at (1,1) size 98x18
             RenderText at (4,1) size 24x16
@@ -265,7 +265,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderText {#text} at (0,0) size 0x0
         RenderBlock (floating) {HR} at (112,32) size 2x2 [border: (1px inset #EEEEEE)]
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (116,30) size 0x19
+        LayoutBR {BR} at (116,30) size 0x19
       RenderBlock (anonymous) at (0,2190) size 769x20
         RenderText {#text} at (0,0) size 529x19
           text run at (0,0) width 529: "The block-level hr below has a percentage width and should still be even with the select."
@@ -273,7 +273,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
@@ -281,7 +281,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
           RenderText {#text} at (0,0) size 0x0
         RenderBlock {HR} at (10,50) size 202x2 [border: (1px inset #EEEEEE)]
         RenderBlock (anonymous) at (10,60) size 200x20
-          RenderBR {BR} at (0,0) size 0x19
+          LayoutBR {BR} at (0,0) size 0x19
       RenderBlock (anonymous) at (0,2300) size 769x20
         RenderText {#text} at (0,0) size 590x19
           text run at (0,0) width 500: "The block-level hr below has an auto width and should still be even with the select. "
@@ -290,7 +290,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x20
           RenderText {#text} at (0,0) size 56x19
             text run at (0,0) width 56: "Line One"
-          RenderBR {BR} at (56,15) size 0x0
+          LayoutBR {BR} at (56,15) size 0x0
           RenderMenuList {SELECT} at (0,20) size 100x20 [bgcolor=#C0C0C0] [border: (1px solid #A9A9A9)]
             RenderBlock (anonymous) at (1,1) size 98x18
               RenderText at (4,1) size 24x16
@@ -298,7 +298,7 @@ layer at (0,0) size 785x2414 backgroundClip at (0,0) size 785x600 clip at (0,0)
           RenderText {#text} at (0,0) size 0x0
         RenderBlock {HR} at (110,38) size 100x2 [border: (1px inset #EEEEEE)]
         RenderBlock (anonymous) at (10,48) size 200x20
-          RenderBR {BR} at (100,0) size 0x19
+          LayoutBR {BR} at (100,0) size 0x19
 layer at (118,1388) size 100x100 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600
   RenderBlock (floating) {DIV} at (110,30) size 100x100
     RenderText {#text} at (0,0) size 99x99