Chromium's VS toolchains now maintain JSON files with the expected
environment, so we don't need to pull in gyp to figure out the batch
file to run. This drops a long obsolete dependency and will make it
possible to handle other VS architectures. (gyp internally only handled
x86 and x64.)
Also trim away the logic in vs_toolchain.py to account for
non-depot_tools toolchains. Unlike Chromium, we don't use these scripts
outside of CI/CQ.
Change-Id: I2c9fddac52eef7b4895731d78c637fdcf9c85033
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/43504
Reviewed-by: Adam Langley <agl@google.com>
David Benjamin
Adam Langley