Chris Bracken 0575633c34 Move ANGLE to flutter/third_party (flutter/engine#51270)
This moves Flutter out of the buildroot's third_party directory and into
//flutter/third_party and updates all BUILD and gni files.

Issue: https://github.com/flutter/flutter/issues/144786
Part of: https://github.com/flutter/flutter/issues/67373

## Pre-launch Checklist

- [X] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [X] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [X] I read and followed the [Flutter Style Guide] and the [C++,
Objective-C, Java style guides].
- [X] I listed at least one issue that this PR fixes in the description
above.
- [X] I added new tests to check the change I am making or feature I am
adding, or the PR is [test-exempt]. See [testing the engine] for
instructions on writing and running engine tests.
- [X] I updated/added relevant documentation (doc comments with `///`).
- [X] The odds of this passing on its first CI run is 0%, because
there's no way the licence script isn't going to have a fit over it, at
which point I promise on my honour that I will dutifully fix all the
things it complains about and re-run, probably more than once.
- [X] This PR fulfils the minimum [Canadian
Content](https://www.youtube.com/watch?v=h9NMnPm5kXc&list=PLJ7QPuvv91JuoPWrLhqX0zDFUoLdynMEk&index=3)
regulations mandated by the CRTC.
- [X] I signed the [CLA].
- [X] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#overview
[Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene
[test-exempt]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
[C++, Objective-C, Java style guides]:
https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
[testing the engine]:
https://github.com/flutter/flutter/wiki/Testing-the-engine
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes
[Discord]: https://github.com/flutter/flutter/wiki/Chat
2024-03-07 16:23:14 -08:00
Languages
Dart 75%
C++ 16.5%
Objective-C++ 2.9%
Java 2.8%
Objective-C 0.7%
Other 1.9%