Fix 'step in' after live edit stack manipulation

src/debug-debugger.js

Index: src/debug-debugger.js
diff --git a/src/debug-debugger.js b/src/debug-debugger.js
index 47a3c8e3ef550eb7ed1ceec737ef2688b3d9f7f7..a332b5706c188f878f64a77d9cc42e1b0b98312a 100644
--- a/src/debug-debugger.js
+++ b/src/debug-debugger.js
@@ -2096,6 +2096,10 @@ DebugCommandProcessor.prototype.changeLiveRequest_ = function(request, response)
   var result_description = Debug.LiveEdit.SetScriptSource(the_script,
       new_source, preview_only, change_log);
   response.body = {change_log: change_log, result: result_description};
+  
+  if (!preview_only && !this.running_ && result_description.stack_modified) {
+    response.body.stepin_recommended = true;
+  }
 };