roll dart2js_info to 0.3.0

DEPS

 # Copyright (c) 2012, 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.
 
 vars = {
   # The dart_root is the root of our sdk checkout. This is normally
   # simply sdk, but if using special gclient specs it can be different.
   "dart_root": "sdk",
 
   # We use mirrors of all github repos to guarantee reproducibility and
@@ skipping 36 matching lines @@
   "boringssl_gen_rev": "@922830c0aad900dd3d143eef1ba06faa83fe263b",
   "boringssl_rev" : "@8d343b44bbab829d1a28fdef650ca95f7db4412e",
   "charcode_tag": "@1.1.0",
   "chrome_rev" : "@19997",
   "cli_util_tag" : "@0.0.1+3",
   "code_transformers_tag": "@v0.4.2+3",
   "collection_tag": "@1.9.1",
   "convert_tag": "@2.0.1",
   "crypto_tag" : "@2.0.1",
   "csslib_tag" : "@0.13.2",
-  "dart2js_info_tag" : "@0.2.7+2",
+  "dart2js_info_tag" : "@0.3.0",
   "dart_services_rev" : "@7aea2574e6f3924bf409a80afb8ad52aa2be4f97",
   "dart_style_tag": "@0.2.10",
   "dartdoc_tag" : "@v0.9.7+4",
   "fixnum_tag": "@0.10.5",
   "func_tag": "@0.1.0",
   "glob_tag": "@1.1.3",
   "html_tag" : "@0.13.0",
   "http_multi_server_tag" : "@2.0.2",
   "http_parser_tag" : "@3.0.2",
   "http_tag" : "@0.11.3+9",
@@ skipping 491 matching lines @@
     # Pull clang if needed or requested via GYP_DEFINES.
     'name': 'gn_clang',
     'pattern': '.',
     'action': ['python', 'sdk/tools/clang/scripts/update.py', '--if-needed'],
   },
   {
     "pattern": ".",
     "action": ["python", Var("dart_root") + "/tools/gyp_dart.py"],
   },
 ]