File.toURL() is deprecated.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@19471 71c3de6d-444a-0410-be80-ed276b4c234a

remoting/src/test/java/hudson/remoting/DummyClassLoader.java

@@ -83,7 +83,7 @@ class DummyClassLoader extends ClassLoader {
                 os.write(loadTransformedClassImage("hudson.remoting.test.TestCallable"));
                 os.close();
                 f.deleteOnExit();
-                return f.toURL();
+                return f.toURI().toURL();
             } catch (IOException e) {
                 return null;
             }