Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/fast/css/text-overflow-input-expected.txt

Index: LayoutTests/platform/mac/fast/css/text-overflow-input-expected.txt
diff --git a/LayoutTests/platform/mac/fast/css/text-overflow-input-expected.txt b/LayoutTests/platform/mac/fast/css/text-overflow-input-expected.txt
index 84611ae905a31bd6690f104f40d22ff3529314f1..75bbd5f7ec543cc16e4438a49662bffa768aad62 100644
--- a/LayoutTests/platform/mac/fast/css/text-overflow-input-expected.txt
+++ b/LayoutTests/platform/mac/fast/css/text-overflow-input-expected.txt
@@ -9,7 +9,7 @@ layer at (0,0) size 800x266
       RenderBlock {P} at (0,34) size 784x56
         RenderText {#text} at (0,0) size 490x18
           text run at (0,0) width 490: "Apply \"text-overflow:clip\" to inputs. The following input should be clipped:"
-        RenderBR {BR} at (489,0) size 1x18
+        LayoutBR {BR} at (489,0) size 1x18
         LayoutTextControl {INPUT} at (0,18) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderText {#text} at (123,18) size 4x18
           text run at (123,18) width 4: " "
@@ -29,7 +29,7 @@ layer at (0,0) size 800x266
         RenderText {#text} at (508,18) size 4x18
           text run at (508,18) width 4: " "
         LayoutTextControl {INPUT} at (512,18) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
-        RenderBR {BR} at (635,18) size 0x18
+        LayoutBR {BR} at (635,18) size 0x18
         LayoutTextControl {INPUT} at (0,37) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderText {#text} at (123,37) size 4x18
           text run at (123,37) width 4: " "
@@ -53,7 +53,7 @@ layer at (0,0) size 800x266
       RenderBlock {P} at (0,106) size 784x56
         RenderText {#text} at (0,0) size 547x18
           text run at (0,0) width 547: "Apply \"text-overflow:ellipsis\" to inputs. The following input should show an ellipsis:"
-        RenderBR {BR} at (546,0) size 1x18
+        LayoutBR {BR} at (546,0) size 1x18
         LayoutTextControl {INPUT} at (0,18) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderText {#text} at (123,18) size 4x18
           text run at (123,18) width 4: " "
@@ -73,7 +73,7 @@ layer at (0,0) size 800x266
         RenderText {#text} at (508,18) size 4x18
           text run at (508,18) width 4: " "
         LayoutTextControl {INPUT} at (512,18) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
-        RenderBR {BR} at (635,18) size 0x18
+        LayoutBR {BR} at (635,18) size 0x18
         LayoutTextControl {INPUT} at (0,37) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderText {#text} at (123,37) size 4x18
           text run at (123,37) width 4: " "
@@ -97,7 +97,7 @@ layer at (0,0) size 800x266
       RenderBlock {P} at (0,178) size 784x56
         RenderText {#text} at (0,0) size 238x18
           text run at (0,0) width 238: "Dynamic style change text-overflow:"
-        RenderBR {BR} at (237,0) size 1x18
+        LayoutBR {BR} at (237,0) size 1x18
         RenderText {#text} at (0,18) size 247x18
           text run at (0,18) width 247: "Clip to ellipsis (should show ellipsis): "
         LayoutTextControl {INPUT} at (246.23,18) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
@@ -106,7 +106,7 @@ layer at (0,0) size 800x266
         LayoutTextControl {INPUT} at (373.23,18) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderText {#text} at (496,18) size 5x18
           text run at (496,18) width 5: " "
-        RenderBR {BR} at (0,0) size 0x0
+        LayoutBR {BR} at (0,0) size 0x0
         RenderText {#text} at (0,37) size 270x18
           text run at (0,37) width 270: "Ellipsis to clip (should not show ellipsis): "
         LayoutTextControl {INPUT} at (269.78,37) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
@@ -115,7 +115,7 @@ layer at (0,0) size 800x266
         LayoutTextControl {INPUT} at (396.78,37) size 123x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
         RenderText {#text} at (519,37) size 5x18
           text run at (519,37) width 5: " "
-        RenderBR {BR} at (0,0) size 0x0
+        LayoutBR {BR} at (0,0) size 0x0
 layer at (11,71) size 117x13 scrollWidth 295
   RenderBlock {DIV} at (3,3) size 117x13 [color=#A9A9A9]
     RenderText {#text} at (0,0) size 296x13