GitLab

- Removes Cronet dependency on Breakpad.
- Applies to developer environment and public bots.
- Reduces Cronet binary size, especially on iOS.
- Official buildbots will be updated separately.

Bug: 811308
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I24fe9075a731a507ed8861e1f4811d4d463bb80d
Reviewed-on: https://chromium-review.googlesource.com/964596
Commit-Queue: Misha Efimov <mef@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544211}