[debug-wrapper] Further extend the debug wrapper

test/debugger/debug/es6/debug-evaluate-blockscopes.js

 // Copyright 2011 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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 //       notice, this list of conditions and the following disclaimer.
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 //       from this software without specific prior written permission.
 //
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 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-debug-as debug
 
 // Test debug evaluation for functions without local context, but with
 // nested catch contexts.
 
 "use strict";
 
 var x;
 var result;
 
 function f() {
   {                   // Line 1.
     let i = 1;        // Line 2.
     try {             // Line 3.
       throw 'stuff';  // Line 4.
     } catch (e) {     // Line 5.
       x = 2;          // Line 6.
     }
   }
 };
 
-// Get the Debug object exposed from the debug context global object.
 var Debug = debug.Debug
 
 function listener(event, exec_state, event_data, data) {
   if (event == Debug.DebugEvent.Break) {
     result = exec_state.frame().evaluate("i").value();
   }
 };
 
 // Add the debug event listener.
 Debug.setListener(listener);
@@ skipping 44 matching lines @@
 });
 
 exception = null;
 f1();
 assertEquals(null, exception, exception);
 exception = null;
 f2();
 assertEquals(null, exception, exception);
 
 Debug.setListener(null);