Mock up code completion.

dart/site/try/build_try.gyp

 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE
 
 {
   'targets': [
     {
       'target_name': 'try_site',
       'type': 'none',
       'dependencies': [
@@ skipping 58 matching lines @@
             # action is executed.
             '<(PRODUCT_DIR)/dart-sdk/README',
 
             '<!@(["python", "../../tools/list_files.py", "\\.dart$", "src"])',
           ],
           'outputs': [
             '<(SHARED_INTERMEDIATE_DIR)/leap.dart.js',
           ],
           'action': [
             '<(PRODUCT_DIR)/dart-sdk/bin/dart2js',
-            '-v',
+            '-p../../sdk/lib/_internal/',
             '-Denable_ir=false',
             'src/leap.dart',
             '-o<(SHARED_INTERMEDIATE_DIR)/leap.dart.js',
           ],
         },
         {
           'action_name': 'nossl_appcache',
           'message': 'Creating nossl.appcache',
           'inputs': [
             'add_time_stamp.py',
@@ skipping 22 matching lines @@
           'files': [
             'app.yaml',
             '<@(try_dart_static_files)',
             '<(SHARED_INTERMEDIATE_DIR)/nossl.appcache',
           ],
         },
       ],
     },
   ],
 }