[bootstrapper] extra natives must not use natives syntax.

src/compiler.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.
 
 #include "src/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 1453 matching lines @@
   }
 
   if (!maybe_result.ToHandle(&result)) {
     // No cache entry found. Compile the script.
 
     // Create a script object describing the script to be compiled.
     Handle<Script> script = isolate->factory()->NewScript(source);
     if (natives == NATIVES_CODE) {
       script->set_type(Script::TYPE_NATIVE);
       script->set_hide_source(true);
+    } else if (natives == EXTENSION_CODE) {
+      script->set_type(Script::TYPE_EXTENSION);
+      script->set_hide_source(true);
     }
     if (!script_name.is_null()) {
       script->set_name(*script_name);
       script->set_line_offset(line_offset);
       script->set_column_offset(column_offset);
     }
     script->set_origin_options(resource_options);
     if (!source_map_url.is_null()) {
       script->set_source_mapping_url(*source_map_url);
     }
@@ skipping 378 matching lines @@
 }
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate()).PrintProgram(literal()));
 }
 #endif
 }  // namespace internal
 }  // namespace v8