Check out the msan instrumented libraries by default.

Now that we have conditional support in DEPS, and have a policy
of "download everything the main bots need" by default, we
can download the instrumented libraries using the stock
download script, and delete the custom script that uses GYP_DEFINES.

Checking out the libraries adds 360MB for the no_origins version
and 2161MB for the chained_origins version. You can skip the
downloads by setting `"checkout_instrumented_libraries": False`
in the custom_vars section of your .gclient file (or by passing 
`--custom-var=checkout_instrumented_libraries=False` when running
`gclient config`). Passing `checkout_configuration="small"` will
also skip the download, along with multiple other optional things.

R=thakis@chromium.org, phajdan.jr@chromium.org
BUG=570091, 772679

Change-Id: I14aa5d9b809217d31459232a00f6918093c47ad0
Reviewed-on: https://chromium-review.googlesource.com/706280
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#507438}
2 files changed