#trunk_track
The code assumes it is run at the root of a git repository pointing to the Dart source code with two remotes.
origin should point to https://chromium.googlesource.com/external/dart/bleeding_edge
trunk should point to https://chromium.googlesource.com/external/dart
Here's a section from .git/config
[remote "origin"]
url = https://chromium.googlesource.com/external/dart/bleeding_edge
fetch = +refs/heads/*:refs/remotes/origin/*
[remote "trunk"]
url = https://chromium.googlesource.com/external/dart
fetch = +refs/heads/*:refs/remotes/trunk/*