Support 'restart call frame' debug command

src/mirror-debugger.js

Index: src/mirror-debugger.js
diff --git a/src/mirror-debugger.js b/src/mirror-debugger.js
index c7f0dccb7b1867b54e6aab592288d1ddd517cc36..5e6e241e8bb8f74ddb99ce4f18717160caade8bc 100644
--- a/src/mirror-debugger.js
+++ b/src/mirror-debugger.js
@@ -1750,6 +1750,15 @@ FrameMirror.prototype.localsText = function() {
 };
 
 
+FrameMirror.prototype.restart = function() {
+  var result = %LiveEditRestartFrame(this.break_id_, this.index_);
+  if (IS_UNDEFINED(result)) {
+    result = "Failed to find requested frame";
+  }
+  return result;
+};
+
+
 FrameMirror.prototype.toText = function(opt_locals) {
   var result = '';
   result += '#' + (this.index() <= 9 ? '0' : '') + this.index();