* cp-tree.h (dfs_mark_primary_bases_queue_p): New function.
	(layout_basetypes): Remove.
	* class.c (propagate_binfo_offsets): Moved here from tree.c.
	Update to handle primary virtual bases.
	(remove_base_fields): New function, split out from
	layout_basetypes.
	(dfs_mark_primary_bases_and_set_vbase_offsets): New function.
	(layout_virtual_bases): New function, split out from
	layout_basetypes.  Update to handle primary virtual bases.
	(layout_basetypes): Moved here from tree.c.  Use
	remove_base_fields and layout_virtual_bases.
	* search.c (dfs_mark_primary_bases_queue_p): New function.
	(mark_primary_bases): Use it.
	* tree.c (CEIL): Remove.
	(propagate_binfo_offsets): Remove.
	(layout_basetypes): Remove.

From-SVN: r31168