* Moved GetNextSupportedType() and IsSubSystemFor() from

BDiskSystem to BPartition and reimplemented them using the userland
  add-on backend instead of syscalls. As a side effect this solves the
  TODO I recently added in GetNextSupportedType().
* Reimplemented BDiskSystem::GetTypeForContentType() using the userland
  add-on backend instead of a syscall.
* Moved GetTypeForContentType() and IsSubSystemFor() from
  BPartitionHandle to BDiskSystemAddOn. They were misplaced.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22592 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/storage/Partition.h

@@ -128,6 +128,18 @@ public:
 									BDiskDeviceParameterEditor** editor);
 			status_t			SetContentParameters(const char* parameters);
 
+			status_t			GetNextSupportedType(int32 *cookie,
+									BString* type) const;
+									// Returns all partition types for this
+									// partition supported by the parent disk
+									// system.
+			status_t			GetNextSupportedChildType(int32 *cookie,
+									BString* type) const;
+									// Returns all partition types for a child
+									// of this partition supported by its disk
+									// system.
+			bool				IsSubSystem(const char* diskSystem) const;
+
 			bool				CanInitialize(const char* diskSystem) const;
 			status_t			GetInitializationParameterEditor(
 									const char* system,