Revert of Fix nexus build by declaring dep on mojo (patchset #1 id:1 of https://codereview.chromium.org/1940893002/ )
Revert of Fix nexus build by declaring dep on mojo (patchset #1 id:1 of https://codereview.chromium.org/1940893002/ )

Reason for revert:
Broke Android builds (due to a race with an earlier CL fixing the same issue).

https://build.chromium.org/p/chromium.android/builders/Android%20x86%20Builder%20%28dbg%29/builds/4215

Original issue's description:
> Fix nexus build by declaring dep on mojo.
>
> See failing bots:
> https://build.chromium.org/p/chromium.gpu/builders/Android%20Debug%20%28Nexus%206%29/
> https://build.chromium.org/p/chromium.gpu/builders/Android%20Debug%20%28Nexus%205%29/
>
> This was mistakenly introduced by landing:
> https://codereview.chromium.org/1882373004/
>
> BUG=586386
> TBR=dalecurtis@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/cea56b55acce0860d2518532752426af12711715
> Cr-Commit-Position: refs/heads/master@{#390952}

TBR=fsamuel@chromium.org,markdittmer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=586386

Review-Url: https://codereview.chromium.org/1934393002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#390967}

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