GitLab

This reverts commit 6e002e1f.

Reason for revert: Official build failure crbug.com/1114609

Original change's description:
> build_vars.txt: Changed to build_vars.json
> 
> And moved helper function into gn_helpers.py
> 
> It was only ever in .properties format so that it
> could be easily parsed by bash, but we no longer need
> that.
> 
> Also fixes default_android_sdk_version to be a string.
> -next builds need it to be a string.
> 
> Bug: None
> Change-Id: I99541f18510de93dae4c0d68b734638564f74ee2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340673
> Commit-Queue: Andrew Grieve <agrieve@chromium.org>
> Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
> Reviewed-by: Dirk Pranke <dpranke@google.com>
> Cr-Commit-Position: refs/heads/master@{#796020}

TBR=dpranke@google.com,agrieve@chromium.org,mheikal@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: None
Change-Id: Iad8597f6af00c534245fd1a40d1809d952758f47
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2344626Reviewed-by: Ben Mason <benmason@chromium.org>
Commit-Queue: Ben Mason <benmason@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796387}