[liveedit] reimplement frame restarting.

test/debugger/debug/es6/debug-liveedit-new-target-3.js

 // Copyright 2015 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.
 
 
 // Test that live-editing a frame above one that uses new.target succeeds.
 
 Debug = debug.Debug
 var wrapper_calls = 0;
 var construct_calls = 0;
 var exceptions = 0;
 var results = [];
 var replace_again;
 
 eval(`
   function LogNewTarget(arg) {
     construct_calls++;
     results.push(new.target);
   }
   function Wrapper() {
     wrapper_calls++;
     ReplaceOnce();
     new LogNewTarget(true);
   }
 `);
 
+function ExecuteInDebugContext(f) {
+  var result;
+  var exception = null;
+  Debug.setListener(function(event) {
+    if (event == Debug.DebugEvent.Break) {
+      try {
+        result = f();
+      } catch (e) {
+        // Rethrow this exception later.
+        exception = e;
+      }
+    }
+  });
+  debugger;
+  Debug.setListener(null);
+  if (exception !== null) throw exception;
+  return result;
+}
+
 function Replace(fun, original, patch) {
-  %ExecuteInDebugContext(function() {
+  ExecuteInDebugContext(function() {
     var change_log = [];
     try {
       var script = Debug.findScript(fun);
       var patch_pos = script.source.indexOf(original);
       Debug.LiveEdit.TestApi.ApplySingleChunkPatch(
           script, patch_pos, original.length, patch, change_log);
     } catch (e) {
       exceptions++;
     }
   });
@@ skipping 24 matching lines @@
 assertEquals(2, wrapper_calls);
 assertEquals(0, exceptions);  // Replace succeeds
 assertEquals([LogNewTarget, LogNewTarget], results);
 
 replace_again = true;
 Wrapper();
 assertEquals(3, construct_calls);
 assertEquals(4, wrapper_calls);  // Restarts
 assertEquals(0, exceptions);  // Replace succeeds
 assertEquals([LogNewTarget, LogNewTarget, LogNewTarget], results);