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Makes sure initialization of tests is correct and also non-Ozone/X11
specific tests are not run when OzonePlatform feature is used.

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PS: Please note that this is a temp solution that will help to choose
between ozone and non-ozone X11 build. The switch that will be used
to choose the path is --enable-features=UseOzonePlatform. Once
non-Ozone X11 path is removed (hopefully by Q1 2021 depending on how
th finch trial goes), the wrapper will be removed.

Please also note that it's impossible to build use_x11 && use_ozone
without some hacks in PlatformCursor code. The changes to that are
on their way to upstream.

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Bug: 1085700
Change-Id: If9f7e04b0c39dfe2782622f225de7d1b901575f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315144
Commit-Queue: Maksim Sisov (GMT+3) <msisov@igalia.com>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791790}