[debug-wrapper] Further extend the debug wrapper

test/mjsunit/debug-break-native.js

-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --expose-debug-as debug
-
-Debug = debug.Debug
-var exception = null;
-
-function breakListener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    exec_state.prepareStep(Debug.StepAction.StepIn);
-    // Assert that the break happens at an intended location.
-    assertTrue(exec_state.frame(0).sourceLineText().indexOf("// break") > 0);
-  } catch (e) {
-    exception = e;
-  }
-}
-
-Debug.setListener(breakListener);
-
-debugger;                          // break
-
-function f(x) {
-  return x;                        // break
-}                                  // break
-
-Debug.setBreakPoint(f, 0, 0);      // break
-Debug.scripts();                   // break
-debug.MakeMirror(f);               // break
-
-new Error("123").stack;            // break
-Math.sin(0);                       // break
-
-f("this should break");            // break
-
-Debug.setListener(null);           // break
-
-f("this should not break");
-
-assertNull(exception);