Added a test to cover debugging step over.

tests/standalone/debugger/step_inout_test.dart

Index: tests/standalone/debugger/step_inout_test.dart
===================================================================
--- tests/standalone/debugger/step_inout_test.dart	(revision 0)
+++ tests/standalone/debugger/step_inout_test.dart	(revision 0)
@@ -0,0 +1,35 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import "debug_lib.dart";
+
+main() {
+  if (RunScript(testScript)) return;
+  
+  foo('foo1');
+  foo('foo2');
+  foo('foo3');
+}
+
+void foo(String str) {
+  print(str);
+}
+
+/**
+ * Set a breakpoint, resume to that breakpoint, step into a method, step out,
+ * step over the next line, and resume execution.
+ */
+var testScript = [
+  MatchFrames(["main"]),
+  SetBreakpoint(10),
+  Resume(),
+  MatchFrames(["main"]),
+  StepInto(),
+  MatchFrames(["foo", "main"]),
+  StepOut(),
+  MatchFrames(["main"]),
+  Step(),
+  MatchFrames(["main"]),
+  Resume(),
+];