Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/tables/mozilla/bugs/bug1188-expected.txt

Index: LayoutTests/platform/mac/tables/mozilla/bugs/bug1188-expected.txt
diff --git a/LayoutTests/platform/mac/tables/mozilla/bugs/bug1188-expected.txt b/LayoutTests/platform/mac/tables/mozilla/bugs/bug1188-expected.txt
index 633b62dc10c250965baa30347c7ca8918ff8069f..640768bc68a9e00117e1b3e805d2adcc123c39af 100644
--- a/LayoutTests/platform/mac/tables/mozilla/bugs/bug1188-expected.txt
+++ b/LayoutTests/platform/mac/tables/mozilla/bugs/bug1188-expected.txt
@@ -30,7 +30,7 @@ layer at (0,0) size 800x600
                   RenderBlock (anonymous) at (8,2) size 35.09x13
                     RenderText {#text} at (0,0) size 36x13
                       text run at (0,0) width 36: "Search"
-                RenderBR {BR} at (516,15) size 1x0
+                LayoutBR {BR} at (516,15) size 1x0
                 RenderInline {SMALL} at (0,0) size 570x15
                   RenderInline {A} at (0,0) size 101x15 [color=#0000EE]
                     RenderText {#text} at (12,20) size 101x15
@@ -79,11 +79,11 @@ layer at (0,0) size 800x600
               LayoutTableCell {TD} at (163,105) size 270x50 [r=2 c=1 rs=1 cs=1]
                 RenderInline {A} at (0,0) size 232x28 [color=#0000EE]
                   LayoutImage {IMG} at (19,1) size 232x35 [border: (1px solid #0000EE)]
-                  RenderBR {BR} at (251,36) size 0x0
+                  LayoutBR {BR} at (251,36) size 0x0
                   RenderInline {FONT} at (0,0) size 48x13
                     RenderText {#text} at (111,36) size 48x13
                       text run at (111,36) width 48: "Click Here!"
-                RenderBR {BR} at (158,46) size 1x0
+                LayoutBR {BR} at (158,46) size 1x0
               LayoutTableCell {TD} at (435,121) size 161x17 [r=2 c=2 rs=1 cs=1]
                 RenderInline {A} at (0,0) size 131x18 [color=#0000EE]
                   RenderInline {FONT} at (0,0) size 131x15 [color=#0066FF]