Add //base and //buildtools to DEPS

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
   # consistency between what users see and what the bots see.
   # We need the mirrors to not have 100+ bots pulling github constantly.
   # We mirror our github repos on chromium git servers.
   # DO NOT use this var if you don't see a mirror here:
   #   https://chromium.googlesource.com/
   # named like:
   #   external/github.com/dart-lang/NAME
   # It is ok to add a dependency directly on dart-lang (dart-lang only)
   # github repo until the mirror has been created, but please do file a bug
   # against infra to make that happen.
   "github_mirror":
       "https://chromium.googlesource.com/external/github.com/dart-lang/%s.git",
 
+  # Chromium git
+  "chromium_git": "https://chromium.googlesource.com",
+
   # Only use this temporarily while waiting for a mirror for a new package.
   "github_dartlang": "https://github.com/dart-lang/%s.git",
 
   "gyp_rev": "@6ee91ad8659871916f9aa840d42e1513befdf638",
   "co19_rev": "@3f0a4bc9a080a792cdf5f093147a900f99ea301f",
   "chromium_git": "https://chromium.googlesource.com",

[zra, 2016/06/22 15:49:09]

rm duplicate definition.

[Cutch, 2016/06/22 17:30:45]

Done.

 
+  # Revisions of GN/Mojo/Flutter related dependencies.
+  "base_revision": "@672b04e54b937ec899429a6bd5409c5a6300d151",
+  "buildtools_revision": "@565d04e8741429fb1b4f26d102f2c6c3b849edeb",
+
   # Revisions of /third_party/* dependencies.
   "args_tag": "@0.13.4",
   "async_tag": "@1.10.0",
   "barback-0.13.0_rev": "@34853",
   "barback-0.14.0_rev": "@36398",
   "barback-0.14.1_rev": "@38525",
   "barback_tag" : "@0.15.2+7",
   "bazel_worker_tag": "@v0.1.0",
   "boolean_selector_tag" : "@1.0.0",
   "boringssl_rev" : "@daeafc22c66ad48f6b32fc8d3362eb9ba31b774e",
@@ skipping 71 matching lines @@
   "which_tag": "@0.1.3+1",
   "yaml_tag": "@2.1.5",
   "zlib_rev": "@c3d0a6190f2f8c924a05ab6cc97b8f975bddd33f",
 }
 
 deps = {
   # Stuff needed for GYP to run.
   Var("dart_root") + "/third_party/gyp":
       Var('chromium_git') + '/external/gyp.git' + Var("gyp_rev"),
 
+  # Stuff needed for GN/Mojo/Flutter.
+  Var("dart_root") + "/base":
+     Var('chromium_git') + '/external/github.com/domokit/base' +  Var('base_revision'),

[zra, 2016/06/22 15:49:10]

It looks like we're breaking long lines by moving e.g. Var('base_revision') down
to the next line. It also looks like we've been abbreviating revision as rev.

[Cutch, 2016/06/22 17:30:45]

Done.

+
+  Var("dart_root") + "/buildtools":
+     Var('chromium_git') + '/chromium/buildtools.git' +  Var('buildtools_revision'),
+
   Var("dart_root") + "/tests/co19/src":
       (Var("github_mirror") % "co19") + Var("co19_rev"),
 
   Var("dart_root") + "/third_party/zlib":
       Var("chromium_git") + "/chromium/src/third_party/zlib.git" +
       Var("zlib_rev"),
 
   Var("dart_root") + "/third_party/boringssl/src":
       "https://boringssl.googlesource.com/boringssl.git" +
       Var("boringssl_rev"),
@@ skipping 328 matching lines @@
       "--extract",
       "-s",
       Var('dart_root') + "/third_party/clang.tar.gz.sha1",
     ],
   },
   {
     "pattern": ".",
     "action": ["python", Var("dart_root") + "/tools/gyp_dart.py"],
   },
 ]