Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/fast/forms/range/range-appearance-basic-expected.txt

Index: LayoutTests/platform/mac/fast/forms/range/range-appearance-basic-expected.txt
diff --git a/LayoutTests/platform/mac/fast/forms/range/range-appearance-basic-expected.txt b/LayoutTests/platform/mac/fast/forms/range/range-appearance-basic-expected.txt
index 2ffb99668d32e1efc559e63b86301b02fd8d9a4e..1a47d7d1fd9015f40fcb7ac012948109ae463f09 100644
--- a/LayoutTests/platform/mac/fast/forms/range/range-appearance-basic-expected.txt
+++ b/LayoutTests/platform/mac/fast/forms/range/range-appearance-basic-expected.txt
@@ -9,7 +9,7 @@ layer at (0,0) size 800x183
             RenderBlock {DIV} at (57,0) size 15x15
       RenderText {#text} at (137,5) size 4x18
         text run at (137,5) width 4: " "
-      RenderBR {BR} at (141,5) size 0x18
+      LayoutBR {BR} at (141,5) size 0x18
       LayoutSlider {INPUT} at (4,27) size 135x21 [color=#909090] [bgcolor=#FFFFFF] [border: (3px solid #00FF00)]
         RenderFlexibleBox {DIV} at (3,3) size 129x15
           RenderBlock {DIV} at (0,0) size 129x15
@@ -22,21 +22,21 @@ layer at (0,0) size 800x183
             RenderBlock {DIV} at (57,0) size 15x15
       RenderText {#text} at (284,34) size 4x18
         text run at (284,34) width 4: " "
-      RenderBR {BR} at (288,34) size 0x18
+      LayoutBR {BR} at (288,34) size 0x18
       LayoutSlider {INPUT} at (4,56) size 129x15 [color=#909090]
         RenderFlexibleBox {DIV} at (0,0) size 129x15
           RenderBlock {DIV} at (0,0) size 129x15
             RenderBlock {DIV} at (57,0) size 15x15
       RenderText {#text} at (137,57) size 4x18
         text run at (137,57) width 4: " "
-      RenderBR {BR} at (141,57) size 0x18
+      LayoutBR {BR} at (141,57) size 0x18
       LayoutSlider {INPUT} at (4,79) size 129x15 [color=#909090] [bgcolor=#FFFFFF]
         RenderFlexibleBox {DIV} at (0,0) size 129x15
           RenderBlock {DIV} at (0,0) size 129x15
             RenderBlock {DIV} at (57,0) size 15x15
       RenderText {#text} at (137,80) size 4x18
         text run at (137,80) width 4: " "
-      RenderBR {BR} at (141,80) size 0x18
+      LayoutBR {BR} at (141,80) size 0x18
       LayoutSlider {INPUT} at (4,102) size 40x15 [color=#909090] [bgcolor=#FFFFFF]
         RenderFlexibleBox {DIV} at (0,0) size 40x15
           RenderBlock {DIV} at (0,0) size 40x15
@@ -55,7 +55,7 @@ layer at (0,0) size 800x183
             RenderBlock {DIV} at (12.50,0) size 15x15
       RenderText {#text} at (152,103) size 4x18
         text run at (152,103) width 4: " "
-      RenderBR {BR} at (156,103) size 0x18
+      LayoutBR {BR} at (156,103) size 0x18
       LayoutSlider {INPUT} at (6,137) size 193.50x22 [color=#909090] [bgcolor=#FFFFFF]
         RenderFlexibleBox {DIV} at (0,0) size 193.50x22
           RenderBlock {DIV} at (0,0) size 193.50x22
@@ -68,4 +68,4 @@ layer at (0,0) size 800x183
             RenderBlock {DIV} at (114,0) size 30x30
       RenderText {#text} at (483,145) size 5x18
         text run at (483,145) width 5: " "
-      RenderBR {BR} at (487,145) size 1x18
+      LayoutBR {BR} at (487,145) size 1x18