Patch by Alex Wilson (minor changes by myself) related to the new archiving

features:
* Some cosmetic adjustments of the API, like using references instead of
  pointers, argument order, method names, etc.
* Added convenience template methods for archiving and unarchiving to BArchiver
  and BUnarchiver.
* BUnarchiver (respectively the private BUnarchiveManager) explicitly deals with
  object ownership, now. This is necessary since an error while unarchiving
  could leave an already unarchived object without owning object, which would
  result in it being leaked. The BUnarchiver::{Get,Find}Object() methods do now
  have an optional parameter to specify whether object ownership shall be
  transferred.
* Fixed incorrect header guard in headers/private/binary_compatibility/Global.h.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37538 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/Layout.h

@@ -54,11 +54,11 @@ public:
 
 	virtual status_t			Archive(BMessage* into, bool deep = true) const;
 	virtual	status_t			AllUnarchived(const BMessage* from);
-	virtual status_t			ArchiveLayoutData(BMessage* into,
-									const BLayoutItem* of) const;
-	virtual status_t			RestoreItemAndData(const BMessage* from,
-									BLayoutItem* item);
 
+	virtual status_t			ItemArchived(BMessage* into, BLayoutItem* item,
+									int32 index) const;
+	virtual	status_t			ItemUnarchived(const BMessage* from,
+									BLayoutItem* item, int32 index);
 protected:
 // TODO: Since memory allocations can fail, we should return a bool and
 // undo the addition, if false.