[Mac] Remove bookmark bar NIB

chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
index 1b2578c22d0859ea9f0723a867eddd9db124bf81..4a0ef76af8fd63a1c480b931aae42591b363dd4b 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
@@ -37,6 +37,8 @@ const int kDefaultFontSize = 12;
 
 };  // namespace
 
+// TODO(lgrey): Bake setting the chevron image into this
+// class instead of setting it externally.
 @interface OffTheSideButtonCell : BookmarkButtonCell
 
 - (NSString*)accessibilityTitle;
@@ -106,6 +108,10 @@ const int kDefaultFontSize = 12;
   return buttonCell;
 }
 
++ (id)offTheSideButtonCell {
+  return [[[OffTheSideButtonCell alloc] init] autorelease];
+}
+
 - (id)initForNode:(const BookmarkNode*)node
              text:(NSString*)text
             image:(NSImage*)image