[liveedit] reimplement frame restarting.

test/debugger/debug/es6/debug-liveedit-new-target-2.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 to introduce new.target fails.
 
 Debug = debug.Debug
 var calls = 0;
 var exceptions = 0;
 var results = [];
 var replace_again;
 
 eval(`
   function LogNewTarget() {
     calls++;
     ReplaceOnce();
     results.push(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) {
       assertEquals("BLOCKED_NO_NEW_TARGET_ON_RESTART",
                    change_log[0].functions_on_stack[0].replace_problem);
       assertInstanceof(e, Debug.LiveEdit.Failure);
@@ skipping 19 matching lines @@
 Revert();
 assertEquals(1, calls);
 assertEquals(0, exceptions);
 assertEquals([LogNewTarget], results);
 
 replace_again = true;
 new LogNewTarget();
 assertEquals(2, calls);  // No restarts
 assertEquals(1, exceptions);  // Replace failed.
 assertEquals([LogNewTarget, true], results);