[bootstrapper] add checks for variable bindings in native scripts.

src/d8.cc

 // Copyright 2012 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.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 1068 matching lines @@
       Script::Compile(utility_context, source, &origin).ToLocalChecked();
   script->Run(utility_context).ToLocalChecked();
   // Mark the d8 shell script as native to avoid it showing up as normal source
   // in the debugger.
   i::Handle<i::Object> compiled_script = Utils::OpenHandle(*script);
   i::Handle<i::Script> script_object = compiled_script->IsJSFunction()
       ? i::Handle<i::Script>(i::Script::cast(
           i::JSFunction::cast(*compiled_script)->shared()->script()))
       : i::Handle<i::Script>(i::Script::cast(
           i::SharedFunctionInfo::cast(*compiled_script)->script()));
-  script_object->set_type(i::Script::TYPE_NATIVE);
+  script_object->set_type(i::Script::TYPE_EXTENSION);
 }
 #endif  // !V8_SHARED
 
 
 Local<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
   Local<ObjectTemplate> global_template = ObjectTemplate::New(isolate);
   global_template->Set(
       String::NewFromUtf8(isolate, "print", NewStringType::kNormal)
           .ToLocalChecked(),
       FunctionTemplate::New(isolate, Print));
@@ skipping 1429 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif