Move and rename RenderBR to LayoutBR.

LayoutTests/platform/linux/fast/css/text-overflow-ellipsis-text-align-center-expected.txt

Index: LayoutTests/platform/linux/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
diff --git a/LayoutTests/platform/linux/fast/css/text-overflow-ellipsis-text-align-center-expected.txt b/LayoutTests/platform/linux/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
index aa1a740c3d8de5e9741c4f4f0aa552efd5be53c8..c8ee20d9b11a7b667851ebe83ba120d4104b6045 100644
--- a/LayoutTests/platform/linux/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
+++ b/LayoutTests/platform/linux/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
@@ -41,16 +41,16 @@ layer at (8,208) size 310x82 clip at (9,209) size 308x80 scrollWidth 684
   RenderBlock {DIV} at (0,200.16) size 310x82 [border: (1px solid #000000)]
     RenderText {#text} at (1,1) size 684x19
       text run at (1,1) width 684: "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
     RenderText {#text} at (2,21) size 675x19
       text run at (2,21) width 675: "orem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
     RenderText {#text} at (3,41) size 666x19
       text run at (3,41) width 666: "rem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
     RenderText {#text} at (3,61) size 662x19
       text run at (3,61) width 662: "em ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
 layer at (8,352) size 310x32 clip at (9,353) size 308x30 scrollWidth 713
   RenderBlock {DIV} at (0,343.88) size 310x32 [border: (1px solid #000000)]
     RenderText {#text} at (2,11) size 173x19
@@ -73,16 +73,16 @@ layer at (8,623) size 310x82 backgroundClip at (0,0) size 0x0 clip at (0,0) size
   RenderBlock {DIV} at (0,615.03) size 310x82 [border: (1px solid #000000)]
     RenderText {#text} at (-374,1) size 684x19
       text run at (-374,1) width 683 RTL override: "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
     RenderText {#text} at (-366,21) size 675x19
       text run at (-366,21) width 674 RTL override: "orem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
     RenderText {#text} at (-359,41) size 666x19
       text run at (-359,41) width 666 RTL override: "rem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
     RenderText {#text} at (-354,61) size 662x19
       text run at (-354,61) width 661 RTL override: "em ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-    RenderBR {BR} at (0,0) size 0x0
+    LayoutBR {BR} at (0,0) size 0x0
 layer at (8,767) size 310x32 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600 scrollX 405.00 scrollWidth 713
   RenderBlock {DIV} at (0,758.75) size 310x32 [border: (1px solid #000000)]
     RenderText {#text} at (135,11) size 173x19