Move and rename RenderBR to LayoutBR.

LayoutTests/platform/mac/fast/forms/select-style-expected.txt

Index: LayoutTests/platform/mac/fast/forms/select-style-expected.txt
diff --git a/LayoutTests/platform/mac/fast/forms/select-style-expected.txt b/LayoutTests/platform/mac/fast/forms/select-style-expected.txt
index cb4635dd0a77871f4c0c6f092139b446c9336e3d..cdd119ee24ed4d6e5951f2ecebc857745b4ea8f0 100644
--- a/LayoutTests/platform/mac/fast/forms/select-style-expected.txt
+++ b/LayoutTests/platform/mac/fast/forms/select-style-expected.txt
@@ -6,17 +6,17 @@ layer at (0,0) size 800x600
       RenderText {#text} at (0,0) size 566x18
         text run at (0,0) width 256: "This tests that styled popups look right. "
         text run at (255,0) width 311: "(Aqua for now- later, we will honor the styling)."
-      RenderBR {BR} at (565,14) size 1x0
+      LayoutBR {BR} at (565,14) size 1x0
       RenderMenuList {SELECT} at (0,19) size 51x18 [bgcolor=#FF0000] [border: (1px solid #A6A6A6)]
         RenderBlock (anonymous) at (1,1) size 49x16
           RenderText at (8,1) size 20x13
             text run at (8,1) width 20: "test"
       RenderText {#text} at (51,18) size 4x18
         text run at (51,18) width 4: " "
-      RenderBR {BR} at (55,32) size 0x0
+      LayoutBR {BR} at (55,32) size 0x0
       RenderText {#text} at (0,37) size 541x18
         text run at (0,37) width 541: "This tests that background color is white by default regardless of the parent element."
-      RenderBR {BR} at (540,51) size 1x0
+      LayoutBR {BR} at (540,51) size 1x0
       RenderInline {SPAN} at (0,0) size 65x28 [bgcolor=#FF0000]
         RenderText {#text} at (0,0) size 0x0
         RenderMenuList {SELECT} at (5,56) size 51x18 [bgcolor=#F8F8F8]
@@ -26,10 +26,10 @@ layer at (0,0) size 800x600
         RenderText {#text} at (56,55) size 4x18
           text run at (56,55) width 4: " "
       RenderText {#text} at (0,0) size 0x0
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       RenderText {#text} at (0,74) size 642x18
         text run at (0,74) width 642: "This tests that background color is inherited from the parent if background-color:inherit is specified."
-      RenderBR {BR} at (641,88) size 1x0
+      LayoutBR {BR} at (641,88) size 1x0
       RenderInline {SPAN} at (0,0) size 65x28 [bgcolor=#FF0000]
         RenderText {#text} at (0,0) size 0x0
         RenderMenuList {SELECT} at (5,93) size 51x18 [border: (1px solid #A6A6A6)]
@@ -39,10 +39,10 @@ layer at (0,0) size 800x600
         RenderText {#text} at (56,92) size 4x18
           text run at (56,92) width 4: " "
       RenderText {#text} at (0,0) size 0x0
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       RenderText {#text} at (0,111) size 653x18
         text run at (0,111) width 653: "This tests that background color is the same as the parent if background-color:transparent is specified."
-      RenderBR {BR} at (652,125) size 1x0
+      LayoutBR {BR} at (652,125) size 1x0
       RenderInline {SPAN} at (0,0) size 65x28 [bgcolor=#FF0000]
         RenderText {#text} at (0,0) size 0x0
         RenderMenuList {SELECT} at (5,130) size 51x18 [border: (1px solid #A6A6A6)]
@@ -52,20 +52,20 @@ layer at (0,0) size 800x600
         RenderText {#text} at (56,129) size 4x18
           text run at (56,129) width 4: " "
       RenderText {#text} at (0,0) size 0x0
-      RenderBR {BR} at (0,0) size 0x0
+      LayoutBR {BR} at (0,0) size 0x0
       RenderText {#text} at (0,148) size 509x18
         text run at (0,148) width 509: "This tests that background is white if only background-image:none is specified."
-      RenderBR {BR} at (508,162) size 1x0
+      LayoutBR {BR} at (508,162) size 1x0
       RenderMenuList {SELECT} at (0,167) size 51x18 [bgcolor=#F8F8F8]
         RenderBlock (anonymous) at (0,0) size 51x18
           RenderText at (8,2) size 20x13
             text run at (8,2) width 20: "test"
       RenderText {#text} at (51,166) size 4x18
         text run at (51,166) width 4: " "
-      RenderBR {BR} at (55,180) size 0x0
+      LayoutBR {BR} at (55,180) size 0x0
       RenderText {#text} at (0,185) size 430x18
         text run at (0,185) width 430: "This tests that the image specified for background-image is visible."
-      RenderBR {BR} at (429,199) size 1x0
+      LayoutBR {BR} at (429,199) size 1x0
       RenderMenuList {SELECT} at (0,203) size 51x18 [bgcolor=#F8F8F8] [border: (1px solid #A6A6A6)]
         RenderBlock (anonymous) at (1,1) size 49x16
           RenderText at (8,1) size 20x13