Move and rename RenderBR to LayoutBR.

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

Index: LayoutTests/platform/linux/tables/mozilla/bugs/bug8858-expected.txt
diff --git a/LayoutTests/platform/linux/tables/mozilla/bugs/bug8858-expected.txt b/LayoutTests/platform/linux/tables/mozilla/bugs/bug8858-expected.txt
index bb5b9a94f3c4da52ae292b35fa52f439f9dcc694..fc5ce2e7e19e5ea922254ade9e897c0861bae881 100644
--- a/LayoutTests/platform/linux/tables/mozilla/bugs/bug8858-expected.txt
+++ b/LayoutTests/platform/linux/tables/mozilla/bugs/bug8858-expected.txt
@@ -7,7 +7,7 @@ layer at (0,0) size 800x601 backgroundClip at (0,0) size 800x600 clip at (0,0) s
         RenderText {#text} at (0,0) size 477x19
           text run at (0,0) width 405: "there's a table below this line with cellspacing=1 and border=2 and "
           text run at (405,0) width 72: "several lines"
-        RenderBR {BR} at (477,15) size 0x0
+        LayoutBR {BR} at (477,15) size 0x0
         RenderText {#text} at (0,20) size 393x19
           text run at (0,20) width 393: "of content beginning 'Pacific Shore Properties ...'. Can you see it?"
       LayoutTable {TABLE} at (0,56) size 776x529 [border: (2px outset #808080)]
@@ -22,7 +22,7 @@ layer at (0,0) size 800x601 backgroundClip at (0,0) size 800x600 clip at (0,0) s
                   RenderInline {FONT} at (0,0) size 228x19 [color=#E91C05]
                     RenderText {#text} at (23,6) size 228x19
                       text run at (23,6) width 228: "elcome to Pacific Shore Properties"
-                    RenderBR {BR} at (251,21) size 0x0
+                    LayoutBR {BR} at (251,21) size 0x0
                 RenderInline {FONT} at (0,0) size 359x16
                   RenderText {#text} at (0,28) size 359x16
                     text run at (0,28) width 359: "Pacific Shore Properties is situated on beautiful Mayne Island."
@@ -31,7 +31,7 @@ layer at (0,0) size 800x601 backgroundClip at (0,0) size 800x600 clip at (0,0) s
                   RenderText {#text} at (0,0) size 731x32
                     text run at (0,0) width 731: "Mayne Island is one of the southern Gulf Islands, off the coast of British Columbia, Canada, between Vancouver and Vancouver"
                     text run at (0,16) width 38: "Island."
-                  RenderBR {BR} at (38,29) size 0x0
+                  LayoutBR {BR} at (38,29) size 0x0
                   RenderText {#text} at (0,32) size 85x16
                     text run at (0,32) width 85: "(See map: left)"
               RenderBlock {P} at (5,129) size 760x80
@@ -39,8 +39,8 @@ layer at (0,0) size 800x601 backgroundClip at (0,0) size 800x600 clip at (0,0) s
                   RenderText {#text} at (0,0) size 743x32
                     text run at (0,0) width 743: "Pacific Shore Properties specializes in the diverse properties of the Southern Gulf Islands; which include Beach, Business, View,"
                     text run at (0,16) width 256: "Acreage, Home, Retirement and Recreation."
-                  RenderBR {BR} at (256,29) size 0x0
-                  RenderBR {BR} at (0,32) size 0x16
+                  LayoutBR {BR} at (256,29) size 0x0
+                  LayoutBR {BR} at (0,32) size 0x16
                   RenderText {#text} at (0,48) size 714x32
                     text run at (0,48) 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 (0,64) width 251: "expertise on the Gulf Islands is unmatched."