Convert Runtime.GetINativeObject_[Dynamic|Static] to use GCHandle.

runtime/delegates.t4

@@ -142,10 +142,10 @@
 			OnlyDynamicUsage = false,
 		},
 
-		new XDelegate ("MonoObject *", "IntPtr", "xamarin_get_inative_object_dynamic",
+		new XDelegate ("GCHandle->MonoObject *", "IntPtr", "xamarin_get_inative_object_dynamic",
 			"id", "IntPtr", "obj",
 			"bool", "bool", "owns",
-			"void *", "IntPtr", "type"
+			"GCHandle->MonoReflectionType *", "IntPtr", "type"
 		) {
 			WrappedManagedFunction = "GetINativeObject_Dynamic",
 			OnlyDynamicUsage = false,
@@ -168,7 +168,7 @@
 			OnlyDynamicUsage = false,
 		},
 
-		new XDelegate ("MonoObject *", "IntPtr", "xamarin_get_inative_object_static",
+		new XDelegate ("GCHandle->MonoObject *", "IntPtr", "xamarin_get_inative_object_static",
 			"id", "IntPtr", "obj",
 			"bool", "bool", "owns",
 			"unsigned int", "uint", "iface_token_ref",

src/ObjCRuntime/Runtime.cs

@@ -689,9 +689,8 @@ namespace ObjCRuntime {
 			/*
 			 * This method is called from marshalling bridge (dynamic mode).
 			 */
-			// It doesn't work to use System.Type in the signature, we get garbage.
-			var type = (System.Type) ObjectWrapper.Convert (type_ptr);
-			return ObjectWrapper.Convert (GetINativeObject (ptr, owns, type));
+			var type = (System.Type) GetGCHandleTarget (type_ptr);
+			return AllocGCHandle (GetINativeObject (ptr, owns, type));
 		}
 			
 		static IntPtr GetINativeObject_Static (IntPtr ptr, bool owns, uint iface_token, uint implementation_token)
@@ -702,7 +701,7 @@ namespace ObjCRuntime {
 
 			var iface = Class.ResolveTypeTokenReference (iface_token);
 			var type = Class.ResolveTypeTokenReference (implementation_token);
-			return ObjectWrapper.Convert (GetINativeObject (ptr, owns, iface, type));
+			return AllocGCHandle (GetINativeObject (ptr, owns, iface, type));
 		}
 
 		static IntPtr GetNSObjectWithType (IntPtr ptr, IntPtr type_ptr, out bool created)