Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/virtual/slimmingpaint/fast/block/float/float-avoidance-expected.txt

Index: LayoutTests/platform/mac/virtual/slimmingpaint/fast/block/float/float-avoidance-expected.txt
diff --git a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/block/float/float-avoidance-expected.txt b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/block/float/float-avoidance-expected.txt
index 319aec1d0a2735a80f60e7b66c0ba372037df9f8..eeb58b8c2eaf194f207e2c4faab1f11b39bba2c8 100644
--- a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/block/float/float-avoidance-expected.txt
+++ b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/block/float/float-avoidance-expected.txt
@@ -15,7 +15,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {P} at (0,88) size 220x74 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
@@ -32,7 +32,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {P} at (0,212) size 220x56 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
@@ -43,7 +43,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
             RenderText {#text} at (36,0) size 12x13
               text run at (36,0) width 12: "Hi"
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (210,28) size 0x18
+        LayoutBR {BR} at (210,28) size 0x18
       RenderBlock (anonymous) at (0,284) size 769x18
         RenderText {#text} at (0,0) size 470x18
           text run at (0,0) width 470: "The block-level button with an auto width should be even with the select."
@@ -51,7 +51,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
@@ -62,7 +62,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
             RenderText {#text} at (0,0) size 12x13
               text run at (0,0) width 12: "Hi"
         RenderBlock (anonymous) at (10,46) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,408) size 769x18
         RenderText {#text} at (0,0) size 504x18
           text run at (0,0) width 504: "The block-level button with a percentage width should be even with the select."
@@ -70,7 +70,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
@@ -81,14 +81,14 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
             RenderText {#text} at (36,0) size 12x13
               text run at (36,0) width 12: "Hi"
         RenderBlock (anonymous) at (10,46) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,532) size 769x18
         RenderText {#text} at (0,0) size 472x18
           text run at (0,0) width 472: "The floating table with a percentage width should be even with the select."
       RenderBlock {P} at (0,566) size 220x68 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
@@ -101,7 +101,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
                 RenderText {#text} at (2,2) size 37x18
                   text run at (2,2) width 37: "Table"
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (210,28) size 0x18
+        LayoutBR {BR} at (210,28) size 0x18
       RenderBlock (anonymous) at (0,650) size 769x36
         RenderText {#text} at (0,0) size 769x36
           text run at (0,0) width 769: "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 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {P} at (0,702) size 220x122 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
@@ -124,7 +124,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
                   text run at (2,20) width 165: "shrink so it can be next to"
                   text run at (2,38) width 93: "previous float."
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (110,28) size 0x18
+        LayoutBR {BR} at (110,28) size 0x18
       RenderBlock (anonymous) at (0,840) size 769x18
         RenderText {#text} at (0,0) size 746x18
           text run at (0,0) width 589: "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 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
@@ -148,7 +148,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
                   text run at (2,20) width 165: "shrink so it can be next to"
                   text run at (2,38) width 93: "previous float."
         RenderBlock (anonymous) at (10,112) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,1030) size 769x18
         RenderText {#text} at (0,0) size 759x18
           text run at (0,0) width 555: "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 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
@@ -176,21 +176,21 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
                   text run at (2,92) width 56: "previous"
                   text run at (2,110) width 34: "float."
         RenderBlock (anonymous) at (10,166) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,1274) size 769x18
         RenderText {#text} at (0,0) size 548x18
           text run at (0,0) width 548: "The floating overflow section with a percentage width should be even with the select."
       RenderBlock {DIV} at (0,1292) size 220x146 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
               text run at (8,2) width 22: "One"
         RenderText {#text} at (0,0) size 0x0
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (210,28) size 0x18
+        LayoutBR {BR} at (210,28) size 0x18
       RenderBlock (anonymous) at (0,1438) size 769x36
         RenderText {#text} at (0,0) size 743x36
           text run at (0,0) width 743: "The floating overflow section with an auto width should be even with the select and shrinks to use the available line"
@@ -198,14 +198,14 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {DIV} at (0,1474) size 220x110 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
               text run at (8,2) width 22: "One"
         RenderText {#text} at (0,0) size 0x0
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (110,28) size 0x18
+        LayoutBR {BR} at (110,28) size 0x18
       RenderBlock (anonymous) at (0,1584) size 769x18
         RenderText {#text} at (0,0) size 661x18
           text run at (0,0) width 661: "The block-level overflow section below has a percentage width and should still be even with the select."
@@ -213,14 +213,14 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
                 text run at (8,2) width 22: "One"
           RenderText {#text} at (0,0) size 0x0
         RenderBlock (anonymous) at (10,136) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,1766) size 769x36
         RenderText {#text} at (0,0) size 768x36
           text run at (0,0) width 631: "The block-level overflow section below has an auto width and should still be even with the select. "
@@ -230,21 +230,21 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
                 text run at (8,2) width 22: "One"
           RenderText {#text} at (0,0) size 0x0
         RenderBlock (anonymous) at (10,136) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,1966) size 769x18
         RenderText {#text} at (0,0) size 454x18
           text run at (0,0) width 454: "The floating hr with a percentage width should be even with the select."
       RenderBlock {DIV} at (0,1984) size 220x56 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
@@ -252,7 +252,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderText {#text} at (0,0) size 0x0
         RenderBlock (floating) {HR} at (112,30) size 82x2 [border: (1px inset #EEEEEE)]
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (196,28) size 0x18
+        LayoutBR {BR} at (196,28) size 0x18
       RenderBlock (anonymous) at (0,2040) size 769x36
         RenderText {#text} at (0,0) size 768x36
           text run at (0,0) width 768: "The floating hr below should still be even with the select and shrinks to use its intrinsic width (which is basically like 1-"
@@ -260,7 +260,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
       RenderBlock {DIV} at (0,2076) size 220x56 [border: (10px solid #FF0000)]
         RenderText {#text} at (10,10) size 60x18
           text run at (10,10) width 60: "Line One"
-        RenderBR {BR} at (69,24) size 1x0
+        LayoutBR {BR} at (69,24) size 1x0
         RenderMenuList {SELECT} at (10,28) size 100x18 [bgcolor=#F8F8F8]
           RenderBlock (anonymous) at (0,0) size 100x18
             RenderText at (8,2) size 22x13
@@ -268,7 +268,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderText {#text} at (0,0) size 0x0
         RenderBlock (floating) {HR} at (112,30) size 2x2 [border: (1px inset #EEEEEE)]
         RenderText {#text} at (0,0) size 0x0
-        RenderBR {BR} at (116,28) size 0x18
+        LayoutBR {BR} at (116,28) size 0x18
       RenderBlock (anonymous) at (0,2132) size 769x18
         RenderText {#text} at (0,0) size 567x18
           text run at (0,0) width 567: "The block-level hr below has a percentage width and should still be even with the select."
@@ -276,7 +276,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
@@ -284,7 +284,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
           RenderText {#text} at (0,0) size 0x0
         RenderBlock {HR} at (10,46) size 202x2 [border: (1px inset #EEEEEE)]
         RenderBlock (anonymous) at (10,56) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
       RenderBlock (anonymous) at (0,2234) size 769x18
         RenderText {#text} at (0,0) size 636x18
           text run at (0,0) width 538: "The block-level hr below has an auto width and should still be even with the select. "
@@ -293,7 +293,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
         RenderBlock (anonymous) at (10,10) size 200x18
           RenderText {#text} at (0,0) size 60x18
             text run at (0,0) width 60: "Line One"
-          RenderBR {BR} at (59,14) size 1x0
+          LayoutBR {BR} at (59,14) size 1x0
           RenderMenuList {SELECT} at (0,18) size 100x18 [bgcolor=#F8F8F8]
             RenderBlock (anonymous) at (0,0) size 100x18
               RenderText at (8,2) size 22x13
@@ -301,7 +301,7 @@ layer at (0,0) size 785x2342 backgroundClip at (0,0) size 785x600 clip at (0,0)
           RenderText {#text} at (0,0) size 0x0
         RenderBlock {HR} at (110,36) size 100x2 [border: (1px inset #EEEEEE)]
         RenderBlock (anonymous) at (10,46) size 200x18
-          RenderBR {BR} at (0,0) size 0x18
+          LayoutBR {BR} at (0,0) size 0x18
 layer at (118,1328) size 100x108 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600
   RenderBlock (floating) {DIV} at (110,28) size 100x108
     RenderText {#text} at (0,0) size 100x108