In Skia (for example), GetPrimarySolutionPath works, but FindGclientRoot
does not (users tend not to use gclient to sync DEPS, etc).
Without this change, we'd get to the loop. If a user had pulled ninja to
third_party/ninja/ninja, then it would work just fine. If they hadn't,
python would throw an exception on the os.path.join line, because we'd
be passing a NoneType as the first argument.
Bug: chromium:1340825
Change-Id: Iab86450c5b6f00bc9c2716b9504debc9a56d9bb1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4034942
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Nico Weber <thakis@chromium.org>