tree 6f7c9dc34092bdb2c94bd43d6a984a90d3720082
parent 43266fb6dd2469ffbc5e08c0b7db6c54d9f9c952
author John McCutchan <john@johnmccutchan.com> 1433279362 -0700
committer John McCutchan <john@johnmccutchan.com> 1433279362 -0700

Add vector_math and box2d as external Dart packages

- Add vector_math and box2d packages as third-party DEPS
- Minimally extend dart_pkg GN rule to support external packages
- Add //third_party/dart-pkg build target to setup external packages in gen/dart-pkg

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1157263003