Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/virtual/slimmingpaint/fast/css/text-overflow-ellipsis-text-align-center-expected.txt

Index: LayoutTests/platform/mac/virtual/slimmingpaint/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
diff --git a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/css/text-overflow-ellipsis-text-align-center-expected.txt b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
index 719b971cd632f4be9a5b2f5b5e3eced0a105b224..d2b850392eb3b27e7d2db1d6de78e6bc25a91612 100644
--- a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
+++ b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/css/text-overflow-ellipsis-text-align-center-expected.txt
@@ -41,16 +41,16 @@ layer at (8,200) size 310x74 clip at (9,201) size 308x72 scrollWidth 739
   RenderBlock {DIV} at (0,192.16) size 310x74 [border: (1px solid #000000)]
     RenderText {#text} at (1,1) size 739x18
       text run at (1,1) width 739: "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 (1,19) size 729x18
       text run at (1,19) width 729: "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 (1,37) size 721x18
       text run at (1,37) width 721: "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 (2,55) size 715x18
       text run at (2,55) width 715: "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 (8,335) size 310x31 clip at (9,336) size 308x29 scrollWidth 767
   RenderBlock {DIV} at (0,326.88) size 310x31 [border: (1px solid #000000)]
     RenderText {#text} at (1,12) size 186x18
@@ -73,16 +73,16 @@ layer at (8,599) size 310x74 backgroundClip at (8,599) size 310x1 clip at (0,0)
   RenderBlock {DIV} at (0,591.03) size 310x74 [border: (1px solid #000000)]
     RenderText {#text} at (-429,1) size 739x18
       text run at (-429,1) width 738 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 (-419,19) size 729x18
       text run at (-419,19) width 728 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 (-411,37) size 721x18
       text run at (-411,37) width 720 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 (-406,55) size 715x18
       text run at (-406,55) width 714 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 (8,734) size 310x31 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600 scrollX 458.00 scrollWidth 767
   RenderBlock {DIV} at (0,725.75) size 310x31 [border: (1px solid #000000)]
     RenderText {#text} at (123,12) size 186x18