Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac-snowleopard/fast/text/capitalize-boundaries-expected.txt

 layer at (0,0) size 800x600 clip at (0,0) size 785x600 scrollHeight 1198
   RenderView at (0,0) size 800x600
 layer at (0,0) size 785x1198 backgroundClip at (0,0) size 785x600 clip at (0,0) size 785x600 outlineClip at (0,0) size 785x600
   RenderBlock {HTML} at (0,0) size 785x1198
     RenderBody {BODY} at (8,8) size 769x1182
       RenderBlock (anonymous) at (0,0) size 769x90
         RenderText {#text} at (0,0) size 352x18
           text run at (0,0) width 352: "This test was provided by open-source contributors on "
         RenderInline {A} at (0,0) size 56x18 [color=#0000EE]
           RenderText {#text} at (351,0) size 56x18
             text run at (351,0) width 56: "Bugzilla"
         RenderText {#text} at (406,0) size 757x72
           text run at (406,0) width 328: ". Currently, the \"Browser rendering\" results are not"
           text run at (0,18) width 757: "expected to match the \"Correct output sample\" results. In fact, I do not entirely agree with all of the given test cases in"
           text run at (0,36) width 744: "terms of their expected results, nor do I think that the browser should yet be expected to match all of the cases in the"
           text run at (0,54) width 189: "different languages, but I am "
           text run at (188,54) width 294: "(at least temporarily) adding the test anyway. "
-        RenderBR {BR} at (481,68) size 1x0
-        RenderBR {BR} at (0,72) size 0x18
+        LayoutBR {BR} at (481,68) size 1x0
+        LayoutBR {BR} at (0,72) size 0x18
       LayoutTable {TABLE} at (0,90) size 769x364
         RenderBlock {CAPTION} at (0,0) size 769x18
           RenderText {#text} at (344,0) size 81x18
             text run at (344,0) width 81: "Input source"
         LayoutTableSection {TBODY} at (0,18) size 769x346
           LayoutTableRow {TR} at (0,2) size 769x58
             LayoutTableCell {TH} at (2,20) size 52x22 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=0 c=0 rs=1 cs=1]
               RenderText {#text} at (2,2) size 48x18
                 text run at (2,2) width 48: "generic"
             LayoutTableCell {TD} at (56,2) size 711x58 [border: (1px solid #EEEEEE)] [r=0 c=1 rs=1 cs=1]
@@ skipping 15 matching lines @@
             LayoutTableCell {TD} at (56,86) size 711x23 [border: (1px solid #EEEEEE)] [r=2 c=1 rs=1 cs=1]
               RenderText {#text} at (2,3) size 223x18
                 text run at (2,3) width 223: "\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 (0,111) size 769x60
             LayoutTableCell {TH} at (2,130) size 52x22 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=3 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 16x18
                 text run at (18,2) width 16: "en"
             LayoutTableCell {TD} at (56,111) size 711x60 [border: (1px solid #EEEEEE)] [r=3 c=1 rs=1 cs=1]
               RenderText {#text} at (2,3) size 437x18
                 text run at (2,3) width 437: "'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 (438,17) size 1x0
+              LayoutBR {BR} at (438,17) size 1x0
               RenderText {#text} at (2,22) size 317x18
                 text run at (2,22) width 317: "\"newcastle\x{2011}upon\x{2011}tyne\" washington\x{2011}on\x{2011}the\x{2011}brazos"
-              RenderBR {BR} at (318,36) size 1x0
+              LayoutBR {BR} at (318,36) size 1x0
               RenderInline {SPAN} at (0,0) size 32x18
                 RenderText {#text} at (2,40) size 32x18
                   text run at (2,40) width 32: "earth"
               RenderText {#text} at (33,40) size 76x18
                 text run at (33,40) width 76: "quake earth"
               RenderInline {SPAN} at (0,0) size 38x18
                 RenderText {#text} at (108,40) size 38x18
                   text run at (108,40) width 38: "worm"
               RenderText {#text} at (145,40) size 5x18
                 text run at (145,40) width 5: " "
@@ skipping 85 matching lines @@
             LayoutTableCell {TD} at (56,86) size 711x23 [border: (1px solid #EEEEEE)] [r=2 c=1 rs=1 cs=1]
               RenderText {#text} at (2,3) size 234x18
                 text run at (2,3) width 234: "\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 (0,111) size 769x60
             LayoutTableCell {TH} at (2,130) size 52x22 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=3 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 16x18
                 text run at (18,2) width 16: "en"
             LayoutTableCell {TD} at (56,111) size 711x60 [border: (1px solid #EEEEEE)] [r=3 c=1 rs=1 cs=1]
               RenderText {#text} at (2,3) size 473x18
                 text run at (2,3) width 473: "'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 (474,17) size 1x0
+              LayoutBR {BR} at (474,17) size 1x0
               RenderText {#text} at (2,22) size 333x18
                 text run at (2,22) width 333: "\"Newcastle-upon-Tyne\" Washington\x{2011}on\x{2011}the\x{2011}Brazos"
-              RenderBR {BR} at (334,36) size 1x0
+              LayoutBR {BR} at (334,36) size 1x0
               RenderText {#text} at (2,40) size 369x18
                 text run at (2,40) width 369: "Earthquake Earthworm Cheeseburger [House] ~Six -Big-"
           LayoutTableRow {TR} at (0,173) size 769x22
             LayoutTableCell {TH} at (2,173) size 52x22 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=4 c=0 rs=1 cs=1]
               RenderText {#text} at (19,2) size 14x18
                 text run at (19,2) width 14: "es"
             LayoutTableCell {TD} at (56,173) size 711x22 [border: (1px solid #EEEEEE)] [r=4 c=1 rs=1 cs=1]
               RenderText {#text} at (2,2) size 67x18
                 text run at (2,2) width 67: "\x{A1}Jalape\x{F1}o!"
           LayoutTableRow {TR} at (0,197) size 769x26
@@ skipping 69 matching lines @@
             LayoutTableCell {TD} at (56,86) size 711x23 [border: (1px solid #EEEEEE)] [r=2 c=1 rs=1 cs=1]
               RenderText {#text} at (2,3) size 234x18
                 text run at (2,3) width 234: "\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 (0,111) size 769x60
             LayoutTableCell {TH} at (2,130) size 52x22 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=3 c=0 rs=1 cs=1]
               RenderText {#text} at (18,2) size 16x18
                 text run at (18,2) width 16: "en"
             LayoutTableCell {TD} at (56,111) size 711x60 [border: (1px solid #EEEEEE)] [r=3 c=1 rs=1 cs=1]
               RenderText {#text} at (2,3) size 481x18
                 text run at (2,3) width 481: "'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 (482,17) size 1x0
+              LayoutBR {BR} at (482,17) size 1x0
               RenderText {#text} at (2,22) size 345x18
                 text run at (2,22) width 345: "\"Newcastle\x{2011}Upon\x{2011}Tyne\" Washington\x{2011}On\x{2011}The\x{2011}Brazos"
-              RenderBR {BR} at (346,36) size 1x0
+              LayoutBR {BR} at (346,36) size 1x0
               RenderInline {SPAN} at (0,0) size 35x18
                 RenderText {#text} at (2,40) size 35x18
                   text run at (2,40) width 35: "Earth"
               RenderText {#text} at (36,40) size 78x18
                 text run at (36,40) width 78: "quake Earth"
               RenderInline {SPAN} at (0,0) size 38x18
                 RenderText {#text} at (113,40) size 38x18
                   text run at (113,40) width 38: "worm"
               RenderText {#text} at (150,40) size 5x18
                 text run at (150,40) width 5: " "
@@ skipping 50 matching lines @@
             LayoutTableCell {TD} at (56,298) size 711x22 [border: (1px solid #EEEEEE)] [r=9 c=1 rs=1 cs=1]
               RenderText {#text} at (2,2) size 208x18
                 text run at (2,2) width 208: "\x{41D}\x{44C}\x{44E}-\x{419}\x{43E}\x{440}\x{43A} 1990-\x{425} 14-Vii-1789"
           LayoutTableRow {TR} at (0,322) size 769x22
             LayoutTableCell {TH} at (2,322) size 52x22 [bgcolor=#F8F8F8] [border: (1px solid #EEEEEE)] [r=10 c=0 rs=1 cs=1]
               RenderText {#text} at (17,2) size 18x18
                 text run at (17,2) width 18: "tlh"
             LayoutTableCell {TD} at (56,322) size 711x22 [border: (1px solid #EEEEEE)] [r=10 c=1 rs=1 cs=1]
               RenderText {#text} at (2,2) size 207x18
                 text run at (2,2) width 207: "TlhIngan Hol Wa''Uy' Loghqam"