[debug-wrapper] migrate some scope related tests

test/debugger/debug/debug-clearbreakpoint.js

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-// Flags: --expose-debug-as debug
-// Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
 // Simple function which stores the last debug event.
 listenerComplete = false;
 exception = false;
 
 var breakpoint = -1;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ skipping 13 matching lines @@
 
 function g() {};
 
 // Set a break point and call to invoke the debug event listener.
 breakpoint = Debug.setBreakPoint(g, 0, 0);
 g();
 
 // Make sure that the debug event listener vas invoked.
 assertTrue(listenerComplete, "listener did not run to completion");
 assertFalse(exception, "exception in listener")