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The goma settings are removed from the configs.
They could be added back if the compile is too slow.

In mb_config, compared to android-marshmallow-arm64-rel:
  * gpu_tests is removed since we don't want it running on emulator.
  * resource_whitelisting is kept as noted in crrev.com/c/1600421


Related CLs: crrev.com/c/1785743, crrev.com/c/1769798

Bug: 997376
Change-Id: I9727a8ad19ea619e39edfdeda6d2bd3a64798d55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1788317Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Haiyang Pan <hypan@google.com>
Cr-Commit-Position: refs/heads/master@{#694337}