The Fuchsia build pulls a version of the Dart SDK that matches the version used in Flutter. The revision
field in dart should match the dart_revision
value in Flutter's DEPS file. The other entries in dart and dart_third_party_pkg should correspond to the values in the Dart SDK deps file.
revision
field of the external/github.com/dart-lang/sdk entry.revision
fields in the dart manifest, for example observatory_pub_packages.jiri update -local-manifest=true
//third_party/dart/tools/create_pkg_manifest.py
The manifests dart_head and dart_third_party_pkg_head pull the Dart SDK sources from top-of-tree. dart_third_party_pkg_head will need to be periodically updated with //dart/tools/create_pkg_manifest.py
as well.