Use use_api consistently.

Author: jimingham

lldb/test/API/lang/swift/step_through_allocating_init/TestStepThroughAllocatingInit.py

@@ -61,14 +61,22 @@ def do_test(self, use_api):
 
         # Step one line so some_string is initialized, make sure we can
         # get its value:
-        thread.StepOver()
+        if use_api:
+            thread.StepOver()
+        else:
+            self.runCmd("thread step-over")
+
         frame_0 = thread.frames[0]
         self.assertIn('Foo.init()', frame_0.GetFunctionName())
         var = frame_0.FindVariable("some_string")
         self.assertTrue(var.GetError().Success())
         self.assertEqual(var.GetSummary(), '"foo"')
 
         # Now make sure that stepping out steps past the thunk:
-        thread.StepOut()
+        if use_api:
+            thread.StepOut()
+        else:
+            self.runCmd("thread step-out")
+
         frame_0 = thread.frames[0]
         self.assertIn("doSomething", frame_0.GetFunctionName())