Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/tables/mozilla/bugs/bug8858-expected.txt

Index: LayoutTests/platform/mac/tables/mozilla/bugs/bug8858-expected.txt
diff --git a/LayoutTests/platform/mac/tables/mozilla/bugs/bug8858-expected.txt b/LayoutTests/platform/mac/tables/mozilla/bugs/bug8858-expected.txt
index 644d8e981d6a00f78ed26a2257e21813546dbfce..9fa316235a7dc98564a3d48e12b65739cdb1fd11 100644
--- a/LayoutTests/platform/mac/tables/mozilla/bugs/bug8858-expected.txt
+++ b/LayoutTests/platform/mac/tables/mozilla/bugs/bug8858-expected.txt
@@ -7,7 +7,7 @@ layer at (0,0) size 800x600
         RenderText {#text} at (0,0) size 512x18
           text run at (0,0) width 432: "there's a table below this line with cellspacing=1 and border=2 and "
           text run at (431,0) width 81: "several lines"
-        RenderBR {BR} at (511,14) size 1x0
+        LayoutBR {BR} at (511,14) size 1x0
         RenderText {#text} at (0,18) size 419x18
           text run at (0,18) width 419: "of content beginning 'Pacific Shore Properties ...'. Can you see it?"
       LayoutTable {TABLE} at (0,52) size 776x529 [border: (2px outset #808080)]
@@ -22,7 +22,7 @@ layer at (0,0) size 800x600
                   RenderInline {FONT} at (0,0) size 235x18 [color=#E91C05]
                     RenderText {#text} at (22,8) size 235x18
                       text run at (22,8) width 235: "elcome to Pacific Shore Properties"
-                    RenderBR {BR} at (256,22) size 1x0
+                    LayoutBR {BR} at (256,22) size 1x0
                 RenderInline {FONT} at (0,0) size 357x15
                   RenderText {#text} at (0,28) size 357x15
                     text run at (0,28) width 357: "Pacific Shore Properties is situated on beautiful Mayne Island."
@@ -31,7 +31,7 @@ layer at (0,0) size 800x600
                   RenderText {#text} at (0,0) size 735x30
                     text run at (0,0) width 735: "Mayne Island is one of the southern Gulf Islands, off the coast of British Columbia, Canada, between Vancouver and Vancouver"
                     text run at (0,15) width 39: "Island."
-                  RenderBR {BR} at (38,27) size 1x0
+                  LayoutBR {BR} at (38,27) size 1x0
                   RenderText {#text} at (0,30) size 86x15
                     text run at (0,30) width 86: "(See map: left)"
               RenderBlock {P} at (5,125) size 760x75
@@ -39,8 +39,8 @@ layer at (0,0) size 800x600
                   RenderText {#text} at (0,0) size 739x30
                     text run at (0,0) width 739: "Pacific Shore Properties specializes in the diverse properties of the Southern Gulf Islands; which include Beach, Business, View,"
                     text run at (0,15) width 257: "Acreage, Home, Retirement and Recreation."
-                  RenderBR {BR} at (256,27) size 1x0
-                  RenderBR {BR} at (0,30) size 0x15
+                  LayoutBR {BR} at (256,27) size 1x0
+                  LayoutBR {BR} at (0,30) size 0x15
                   RenderText {#text} at (0,45) size 714x30
                     text run at (0,45) width 714: "In business for over 35 years, and the oldest real estate company on Mayne Island, Pacific Shore Properties knowledge and"
                     text run at (0,60) width 250: "expertise on the Gulf Islands is unmatched."