GitLab

Revert of Update MB to use `gn analyze`. (patchset #9 id:160001 of https://codereview.chromium.org/2298403002/ )

Reason for revert:
Need to add "aura_builder", probably others ...

Original issue's description:
> Update MB to use `gn analyze`.
>
> Now that GN supports a form of `analyze` directly, this patch
> updates //tools/mb to use it rather than working awkwardly through
> `gn refs`. The MB implementation now is mostly responsible for
> mapping ninja targets to labels, calling GN, and then mapping returned
> labels back to ninja targets. Eventually we should update the
> recipes to just pass labels around instead.
>
> One significant change is that now we need entries in gn_isolate_map.pyl
> for every target listed in 'additional_compile_targets' and
> 'isolated_scripts' as well as in 'gtest_tests', because we have to remap
> everything to the GN labels, not just tests for swarming.
>
> We should switch everything to using GN labels directly, but that'll require
> follow-on CLs.
>
> R=brettw@chromium.org
> BUG=555273
>
> Committed: https://crrev.com/9aba8b21177df3ed3e897d5c500d845fbf5523e6
> Cr-Commit-Position: refs/heads/master@{#419315}

TBR=phajdan.jr@chromium.org,brettw@chromium.org,kbr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=555273

Review-Url: https://codereview.chromium.org/2341403004
Cr-Commit-Position: refs/heads/master@{#419321}