Start pulling pub from its own repo.

utils/pub/pub.gyp

 # Copyright (c) 2013, 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 file.
 
 {
   'targets': [
     {
       'target_name': 'pub',
       'type': 'none',
       'dependencies': [
         '../../runtime/dart-runtime.gyp:dart',
         '../../pkg/pkg.gyp:pkg_packages',
         '../../pkg/pkg_files.gyp:pkg_files_stamp',
-        '../../utils/compiler/compiler.gyp:dart2js_files_stamp',
-        'pub_files_stamp'
+        '../../utils/compiler/compiler.gyp:dart2js_files_stamp'
       ],
       'actions': [
         {
           'action_name': 'generate_pub_snapshot',
           'inputs': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
             '../../sdk/lib/_internal/libraries.dart',
-            '<(SHARED_INTERMEDIATE_DIR)/pub_files.stamp',
             '<(SHARED_INTERMEDIATE_DIR)/dart2js_files.stamp',
             '<(SHARED_INTERMEDIATE_DIR)/pkg_files.stamp',
             '<(SHARED_INTERMEDIATE_DIR)/packages.stamp',
           ],
           'outputs': [
             '<(SHARED_INTERMEDIATE_DIR)/pub.dart.snapshot',
           ],
           'action': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
             '--package-root=<(PRODUCT_DIR)/packages/',
             '--snapshot=<(SHARED_INTERMEDIATE_DIR)/pub.dart.snapshot',
-            '../../sdk/lib/_internal/pub/bin/pub.dart',
+            '../../third_party/pkg_tested/pub/bin/pub.dart',
           ]
         },
       ],
     },
-    # Other targets depend on pub files, but have to many inputs, which causes
-    # issues on some platforms.
-    # This target lists all the files in sdk/lib/_internal/pub,
-    # and creates a single pub_files.stamp
-    {
-      'target_name': 'pub_files_stamp',
-      'type': 'none',
-      'actions': [
-        {
-          'action_name': 'make_pub_files_stamp',
-          'inputs': [
-            '../../tools/create_timestamp_file.py',
-            '<!@(["python", "../../tools/list_files.py", "\\.dart$",'
-                ' "../../sdk/lib/_internal/pub"])',
-          ],
-          'outputs': [
-            '<(SHARED_INTERMEDIATE_DIR)/pub_files.stamp',
-          ],
-          'action': [
-            'python', '../../tools/create_timestamp_file.py',
-            '<@(_outputs)',
-          ],
-        },
-      ],
-    }
-
-
   ],
 }