Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/fast/inline-block/006-expected.txt

Index: LayoutTests/platform/linux/fast/inline-block/006-expected.txt
diff --git a/LayoutTests/platform/linux/fast/inline-block/006-expected.txt b/LayoutTests/platform/linux/fast/inline-block/006-expected.txt
index d037163f4e2143292172141bc1f75e044512cc3f..322d9bfcb566c1f6146199d622f0ef2af849ff3a 100644
--- a/LayoutTests/platform/linux/fast/inline-block/006-expected.txt
+++ b/LayoutTests/platform/linux/fast/inline-block/006-expected.txt
@@ -7,11 +7,11 @@ layer at (0,0) size 800x600
         text run at (0,0) width 293: "This is a baseline alignment test for inline blocks. "
         text run at (293,0) width 478: "The last lines of the two red-bordered inline blocks should line up and be on the"
         text run at (0,20) width 56: "baseline. "
-      RenderBR {BR} at (56,35) size 0x0
+      LayoutBR {BR} at (56,35) size 0x0
       RenderBlock {DIV} at (0,70) size 241x64 [border: (2px solid #FF0000)]
         RenderText {#text} at (12,12) size 76x19
           text run at (12,12) width 76: "This is block"
-        RenderBR {BR} at (88,27) size 0x0
+        LayoutBR {BR} at (88,27) size 0x0
         RenderText {#text} at (12,32) size 217x19
           text run at (12,32) width 79: "number one. "
           text run at (91,32) width 138: "This line is the last one."
@@ -21,7 +21,7 @@ layer at (0,0) size 800x600
         RenderBlock (anonymous) at (12,12) size 158x40
           RenderText {#text} at (0,0) size 38x19
             text run at (0,0) width 38: "This is"
-          RenderBR {BR} at (38,15) size 0x0
+          LayoutBR {BR} at (38,15) size 0x0
           RenderText {#text} at (0,20) size 76x19
             text run at (0,20) width 76: "number two."
         RenderBlock {DIV} at (12,52) size 158x40
@@ -29,6 +29,6 @@ layer at (0,0) size 800x600
             text run at (10,10) width 138: "This line is the last one."
       RenderText {#text} at (427,102) size 133x19
         text run at (427,102) width 133: " More text on the line."
-      RenderBR {BR} at (560,117) size 0x0
+      LayoutBR {BR} at (560,117) size 0x0
       RenderText {#text} at (0,174) size 80x19
         text run at (0,174) width 80: "The next line."