Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/virtual/slimmingpaint/fast/text/capitalize-boundaries-expected.txt

 layer at (0,0) size 800x600 clip at (0,0) size 785x600 scrollHeight 1349
   RenderView at (0,0) size 800x600
 layer at (0,0) size 785x1349 backgroundClip at (0,0) size 785x600 clip at (0,0) size 785x600 outlineClip at (0,0) size 785x600
   RenderBlock {HTML} at (0,0) size 785x1349
     RenderBody {BODY} at (8,8) size 769x1333
       RenderBlock (anonymous) at (0,0) size 769x100
         RenderText {#text} at (0,0) size 334x19
           text run at (0,0) width 334: "This test was provided by open-source contributors on "
         RenderInline {A} at (0,0) size 46x19 [color=#0000EE]
           RenderText {#text} at (334,0) size 46x19
             text run at (334,0) width 46: "Bugzilla"
         RenderText {#text} at (380,0) size 767x79
           text run at (380,0) width 379: ". Currently, the \"Browser rendering\" results are not expected to"
           text run at (0,20) width 634: "match the \"Correct output sample\" results. In fact, I do not entirely agree with all of the given test cases in "
           text run at (634,20) width 79: "terms of their"
           text run at (0,40) width 767: "expected results, nor do I think that the browser should yet be expected to match all of the cases in the different languages, but I"
           text run at (0,60) width 22: "am "
           text run at (22,60) width 273: "(at least temporarily) adding the test anyway. "
-        RenderBR {BR} at (295,75) size 0x0
-        RenderBR {BR} at (0,80) size 0x19
+        LayoutBR {BR} at (295,75) size 0x0
+        LayoutBR {BR} at (0,80) size 0x19
       LayoutTable {TABLE} at (0,100) size 769x411
         RenderBlock {CAPTION} at (0,0) size 769x20
           RenderText {#text} at (347,0) size 75x19
             text run at (347,0) width 75: "Input source"
         LayoutTableSection {TBODY} at (0,20) size 769x391
           LayoutTableRow {TR} at (0,2) size 769x64
             LayoutTableCell {TH} at (2,22) size 53x24 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=0 c=0 rs=1 cs=1]
               RenderText {#text} at (2,2) size 49x19
                 text run at (2,2) width 49: "generic"
             LayoutTableCell {TD} at (57,2) size 710x64 [border: (1px solid #EEEEEE)] [r=0 c=1 rs=1 cs=1]
@@ skipping 15 matching lines @@
             LayoutTableCell {TD} at (57,94) size 710x34 [border: (1px solid #EEEEEE)] [r=2 c=1 rs=1 cs=1]
               RenderText {#text} at (2,8) size 204x19
                 text run at (2,8) width 204: "\x{3B3}\x{3B5}\x{3C9}\x{3B3}\x{3C1}\x{3B1}\x{3C6}\x{3B9}\x{3BA}\x{3AC}\x{2010}\x{3C3}\x{3C5}\x{3C3}\x{3C7}\x{3B5}\x{3C4}\x{3B9}\x{3C3}\x{3BC}\x{3AD}\x{3BD}\x{3B5}\x{3C2} \x{3AE}\x{3C4}\x{3B1}"
           LayoutTableRow {TR} at (0,130) size 769x74
             LayoutTableCell {TH} at (2,155) size 53x24 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=3 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 17x19
                 text run at (18,2) width 17: "en"
             LayoutTableCell {TD} at (57,130) size 710x74 [border: (1px solid #EEEEEE)] [r=3 c=1 rs=1 cs=1]
               RenderText {#text} at (2,8) size 407x19
                 text run at (2,8) width 407: "'cept nut'in safari\x{2019}s \x{2018}sure\x{2019} nai\x{308}ve r\x{E9}sum\x{E9}\x{2014}h\x{E1}c\x{30C}ek full\x{2010}time one-to-one"
-              RenderBR {BR} at (408,23) size 1x0
+              LayoutBR {BR} at (408,23) size 1x0
               RenderText {#text} at (2,32) size 298x19
                 text run at (2,32) width 298: "\"newcastle\x{2011}upon\x{2011}tyne\" washington\x{2011}on\x{2011}the\x{2011}brazos"
-              RenderBR {BR} at (300,47) size 0x0
+              LayoutBR {BR} at (300,47) size 0x0
               RenderInline {SPAN} at (0,0) size 30x19
                 RenderText {#text} at (2,52) size 30x19
                   text run at (2,52) width 30: "earth"
               RenderText {#text} at (32,52) size 71x19
                 text run at (32,52) width 71: "quake earth"
               RenderInline {SPAN} at (0,0) size 35x19
                 RenderText {#text} at (103,52) size 35x19
                   text run at (103,52) width 35: "worm"
               RenderText {#text} at (138,52) size 4x19
                 text run at (138,52) width 4: " "
@@ skipping 85 matching lines @@
             LayoutTableCell {TD} at (57,94) size 710x34 [border: (1px solid #EEEEEE)] [r=2 c=1 rs=1 cs=1]
               RenderText {#text} at (2,8) size 211x19
                 text run at (2,8) width 211: "\x{393}\x{3B5}\x{3C9}\x{3B3}\x{3C1}\x{3B1}\x{3C6}\x{3B9}\x{3BA}\x{3AC}\x{2010}\x{3A3}\x{3C5}\x{3C3}\x{3C7}\x{3B5}\x{3C4}\x{3B9}\x{3C3}\x{3BC}\x{3AD}\x{3BD}\x{3B5}\x{3C2} \x{389}\x{3C4}\x{3B1}"
           LayoutTableRow {TR} at (0,130) size 769x74
             LayoutTableCell {TH} at (2,155) size 53x24 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=3 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 17x19
                 text run at (18,2) width 17: "en"
             LayoutTableCell {TD} at (57,130) size 710x74 [border: (1px solid #EEEEEE)] [r=3 c=1 rs=1 cs=1]
               RenderText {#text} at (2,8) size 449x19
                 text run at (2,8) width 449: "'Cept Nut'in Safari\x{2019}s \x{2018}Sure\x{2019} Na\x{EF}ve R\x{E9}sum\x{E9}\x{2014}H\x{E1}\x{10D}ek Full\x{2010}time One-to-One"
-              RenderBR {BR} at (451,23) size 0x0
+              LayoutBR {BR} at (451,23) size 0x0
               RenderText {#text} at (2,32) size 314x19
                 text run at (2,32) width 314: "\"Newcastle-upon-Tyne\" Washington\x{2011}on\x{2011}the\x{2011}Brazos"
-              RenderBR {BR} at (316,47) size 0x0
+              LayoutBR {BR} at (316,47) size 0x0
               RenderText {#text} at (2,52) size 349x19
                 text run at (2,52) width 349: "Earthquake Earthworm Cheeseburger [House] ~Six -Big-"
           LayoutTableRow {TR} at (0,206) size 769x24
             LayoutTableCell {TH} at (2,206) size 53x24 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=4 c=0 rs=1 cs=1]
               RenderText {#text} at (19,2) size 15x19
                 text run at (19,2) width 15: "es"
             LayoutTableCell {TD} at (57,206) size 710x24 [border: (1px solid #EEEEEE)] [r=4 c=1 rs=1 cs=1]
               RenderText {#text} at (2,2) size 63x19
                 text run at (2,2) width 63: "\x{A1}Jalape\x{F1}o!"
           LayoutTableRow {TR} at (0,232) size 769x27
@@ skipping 69 matching lines @@
             LayoutTableCell {TD} at (57,94) size 710x34 [border: (1px solid #EEEEEE)] [r=2 c=1 rs=1 cs=1]
               RenderText {#text} at (2,8) size 211x19
                 text run at (2,8) width 211: "\x{393}\x{3B5}\x{3C9}\x{3B3}\x{3C1}\x{3B1}\x{3C6}\x{3B9}\x{3BA}\x{3AC}\x{2010}\x{3A3}\x{3C5}\x{3C3}\x{3C7}\x{3B5}\x{3C4}\x{3B9}\x{3C3}\x{3BC}\x{3AD}\x{3BD}\x{3B5}\x{3C2} \x{389}\x{3C4}\x{3B1}"
           LayoutTableRow {TR} at (0,130) size 769x74
             LayoutTableCell {TH} at (2,155) size 53x24 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=3 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 17x19
                 text run at (18,2) width 17: "en"
             LayoutTableCell {TD} at (57,130) size 710x74 [border: (1px solid #EEEEEE)] [r=3 c=1 rs=1 cs=1]
               RenderText {#text} at (2,8) size 457x19
                 text run at (2,8) width 457: "'Cept Nut'in Safari\x{2019}s \x{2018}Sure\x{2019} Nai\x{308}ve R\x{E9}sum\x{E9}\x{2014}H\x{E1}c\x{30C}ek Full\x{2010}Time One-To-One"
-              RenderBR {BR} at (458,23) size 1x0
+              LayoutBR {BR} at (458,23) size 1x0
               RenderText {#text} at (2,32) size 327x19
                 text run at (2,32) width 327: "\"Newcastle\x{2011}Upon\x{2011}Tyne\" Washington\x{2011}On\x{2011}The\x{2011}Brazos"
-              RenderBR {BR} at (329,47) size 0x0
+              LayoutBR {BR} at (329,47) size 0x0
               RenderInline {SPAN} at (0,0) size 32x19
                 RenderText {#text} at (2,52) size 32x19
                   text run at (2,52) width 32: "Earth"
               RenderText {#text} at (34,52) size 73x19
                 text run at (34,52) width 73: "quake Earth"
               RenderInline {SPAN} at (0,0) size 35x19
                 RenderText {#text} at (107,52) size 35x19
                   text run at (107,52) width 35: "worm"
               RenderText {#text} at (142,52) size 4x19
                 text run at (142,52) width 4: " "
@@ skipping 50 matching lines @@
             LayoutTableCell {TD} at (57,339) size 710x24 [border: (1px solid #EEEEEE)] [r=9 c=1 rs=1 cs=1]
               RenderText {#text} at (2,2) size 204x19
                 text run at (2,2) width 204: "\x{41D}\x{44C}\x{44E}-\x{419}\x{43E}\x{440}\x{43A} 1990-\x{425} 14-Vii-1789"
           LayoutTableRow {TR} at (0,365) size 769x24
             LayoutTableCell {TH} at (2,365) size 53x24 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=10 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 17x19
                 text run at (18,2) width 17: "tlh"
             LayoutTableCell {TD} at (57,365) size 710x24 [border: (1px solid #EEEEEE)] [r=10 c=1 rs=1 cs=1]
               RenderText {#text} at (2,2) size 192x19
                 text run at (2,2) width 192: "TlhIngan Hol Wa''Uy' Loghqam"