Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/editing/selection/3690703-2-expected.txt

 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderBlock {HTML} at (0,0) size 800x600
     RenderBody {BODY} at (8,3) size 784x581 [bgcolor=#FFFFFF]
       RenderBlock {CENTER} at (0,0) size 784x272
         LayoutTable {TABLE} at (0,0) size 784x20
           LayoutTableSection {TBODY} at (0,0) size 784x20
             LayoutTableRow {TR} at (0,0) size 784x16
               LayoutTableCell {TD} at (0,0) size 784x16 [r=0 c=0 rs=1 cs=1]
                 RenderInline {FONT} at (0,0) size 101x15
                   RenderInline {A} at (0,0) size 101x15 [color=#0000CC]
                     RenderText {#text} at (683,0) size 101x15
                       text run at (683,0) width 101: "Personalized Home"
             LayoutTableRow {TR} at (0,16) size 784x4
               LayoutTableCell {TD} at (0,17) size 784x1 [r=1 c=0 rs=1 cs=1]
                 LayoutImage {IMG} at (0,0) size 1x1
         RenderBlock (anonymous) at (0,20) size 784x40
-          RenderBR {BR} at (392,0) size 0x19
-          RenderBR {BR} at (392,20) size 0x19
+          LayoutBR {BR} at (392,0) size 0x19
+          LayoutBR {BR} at (392,20) size 0x19
         RenderBlock {DIV} at (0,60) size 784x108 [border: (2px solid #AAAAFF)]
           LayoutTable {TABLE} at (218,2) size 348x24
             LayoutTableSection {TBODY} at (0,0) size 348x24
               LayoutTableRow {TR} at (0,0) size 348x24
                 LayoutTableCell {TD} at (0,0) size 348x24 [r=0 c=0 rs=1 cs=1]
                   RenderInline {FONT} at (0,0) size 340x15
                     RenderInline {B} at (0,0) size 25x15
                       RenderText {#text} at (4,4) size 25x15
                         text run at (4,4) width 25: "Web"
                     RenderText {#text} at (29,4) size 12x15
@@ skipping 33 matching lines @@
                         RenderText {#text} at (306,4) size 38x15
                           text run at (306,4) width 38: "more \x{BB}"
           LayoutTable {TABLE} at (28,26) size 728x44
             LayoutTableSection {TBODY} at (0,0) size 728x44
               LayoutTableRow {TR} at (0,0) size 728x44
                 LayoutTableCell {TD} at (0,12) size 182x20 [r=0 c=0 rs=1 cs=1]
                   RenderText {#text} at (0,0) size 4x19
                     text run at (0,0) width 4: " "
                 LayoutTableCell {TD} at (182,0) size 364x44 [r=0 c=1 rs=1 cs=1]
                   LayoutTextControl {INPUT} at (0,0) size 364x22 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
-                  RenderBR {BR} at (364,16) size 0x0
+                  LayoutBR {BR} at (364,16) size 0x0
                   RenderButton {INPUT} at (72.50,22) size 102x22 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
                     RenderBlock (anonymous) at (8,3) size 86x16
                       RenderText {#text} at (0,0) size 86x16
                         text run at (0,0) width 86: "Google Search"
                   RenderButton {INPUT} at (174.50,22) size 117x22 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
                     RenderBlock (anonymous) at (8,3) size 101x16
                       RenderText {#text} at (0,0) size 101x16
                         text run at (0,0) width 101: "I'm Feeling Lucky"
                 LayoutTableCell {TD} at (546,0) size 182x36 [r=0 c=2 rs=1 cs=1]
                   RenderInline {FONT} at (0,0) size 74x36
                     RenderText {#text} at (0,0) size 6x12
                       text run at (0,0) width 6: "  "
                     RenderInline {A} at (0,0) size 68x12 [color=#0000CC]
                       RenderText {#text} at (6,0) size 68x12
                         text run at (6,0) width 68: "Advanced Search"
-                    RenderBR {BR} at (74,10) size 0x0
+                    LayoutBR {BR} at (74,10) size 0x0
                     RenderText {#text} at (0,12) size 6x12
                       text run at (0,12) width 6: "  "
                     RenderInline {A} at (0,0) size 43x12 [color=#0000CC]
                       RenderText {#text} at (6,12) size 43x12
                         text run at (6,12) width 43: "Preferences"
-                    RenderBR {BR} at (49,22) size 0x0
+                    LayoutBR {BR} at (49,22) size 0x0
                     RenderText {#text} at (0,24) size 6x12
                       text run at (0,24) width 6: "  "
                     RenderInline {A} at (0,0) size 65x12 [color=#0000CC]
                       RenderText {#text} at (6,24) size 65x12
                         text run at (6,24) width 65: "Language Tools"
           RenderBlock (anonymous) at (2,70) size 780x36
-            RenderBR {BR} at (390,0) size 0x19
+            LayoutBR {BR} at (390,0) size 0x19
             RenderInline {FONT} at (0,0) size 146x15
               RenderInline {FONT} at (0,0) size 28x15 [color=#FF0000]
                 RenderText {#text} at (317,20) size 28x15
                   text run at (317,20) width 28: "New!"
               RenderText {#text} at (345,20) size 3x15
                 text run at (345,20) width 3: " "
               RenderInline {A} at (0,0) size 112x15 [color=#0000CC]
                 RenderText {#text} at (348,20) size 112x15
                   text run at (348,20) width 112: "Personalize this page"
               RenderText {#text} at (460,20) size 3x15
                 text run at (460,20) width 3: "."
             RenderText {#text} at (0,0) size 0x0
         RenderBlock (anonymous) at (0,168) size 784x76
-          RenderBR {BR} at (392,0) size 0x19
-          RenderBR {BR} at (392,20) size 0x19
-          RenderBR {BR} at (392,40) size 0x19
+          LayoutBR {BR} at (392,0) size 0x19
+          LayoutBR {BR} at (392,20) size 0x19
+          LayoutBR {BR} at (392,40) size 0x19
           RenderInline {FONT} at (0,0) size 316x15
             RenderInline {A} at (0,0) size 117x15 [color=#0000CC]
               RenderText {#text} at (234,60) size 117x15
                 text run at (234,60) width 117: "Advertising Programs"
             RenderText {#text} at (351,60) size 10x15
               text run at (351,60) width 10: " - "
             RenderInline {A} at (0,0) size 103x15 [color=#0000CC]
               RenderText {#text} at (361,60) size 103x15
                 text run at (361,60) width 103: "Business Solutions"
             RenderText {#text} at (464,60) size 10x15
               text run at (464,60) width 10: " - "
             RenderInline {A} at (0,0) size 76x15 [color=#0000CC]
               RenderText {#text} at (474,60) size 76x15
                 text run at (474,60) width 76: "About Google"
         RenderBlock {P} at (0,260) size 784x12
           RenderInline {FONT} at (0,0) size 60x12
             RenderText {#text} at (362,0) size 60x12
               text run at (362,0) width 60: "\x{A9}2005 Google"
 layer at (220,92) size 360x16
   RenderBlock {DIV} at (2,3) size 360x16
 selection start: position 0 of child 3 {INPUT} of child 1 {TD} of child 0 {TR} of child 0 {TBODY} of child 2 {TABLE} of child 4 {DIV} of child 0 {CENTER} of body
 selection end:   position 1 of child 2 {BR} of child 0 {FONT} of child 2 {TD} of child 0 {TR} of child 0 {TBODY} of child 2 {TABLE} of child 4 {DIV} of child 0 {CENTER} of body