[Mac] Refactor bookmark bar controller

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

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h b/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h
index 184242aec0799dea6944873dfb0a0d3ff9c3bd8b..5a3ff163341ad9b44751178af9cf78a77704aadc 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h
@@ -44,6 +44,13 @@ class BookmarkNode;
 @property(nonatomic, readwrite, assign) int startingChildIndex;
 @property(nonatomic, readwrite, assign) BOOL drawFolderArrow;
 
+// Returns the width of a cell for the given node and image for
+// display on the bookmark bar (meaning no arrow for folder
+// nodes). Used for laying out bookmark bar without creating
+// live cells.
++ (CGFloat)cellWidthForNode:(const bookmarks::BookmarkNode*)node
+                      image:(NSImage*)image;
+
 // Create a button cell which draws with a theme.
 + (id)buttonCellForNode:(const bookmarks::BookmarkNode*)node
                    text:(NSString*)text
@@ -87,6 +94,8 @@ class BookmarkNode;
 - (void)setTextColor:(NSColor*)color;
 
 - (BOOL)isFolderButtonCell;
+- (void)setBookmarkNode:(const bookmarks::BookmarkNode*)node
+                  image:(NSImage*)image;
 
 @end