GitLab

This reverts commit 5f933e80.

Reason for revert: crbug.com/744235 All ARC apps are broken (black screen.)

Original change's description:
> exo: Use one LayerTreeFrameSink per toplevel window
> 
> Having one LayerTreeFrameSink for every sub-surface
> causes synchronizing problem between sub-surfaces, so
> we decide to only have one LayerTreeFrameSink per
> toplevel window.
> 
> Bug: 731742
> Change-Id: I6f3e09c33f6f98aab281ce2fab032f9df29f1e7d
> Reviewed-on: https://chromium-review.googlesource.com/552719
> Commit-Queue: Peng Huang <penghuang@chromium.org>
> Reviewed-by: David Reveman <reveman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#486788}

TBR=penghuang@chromium.org,reveman@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 731742
Change-Id: Id6dabf41959396ee20b0e87e88feb9a432f41fb4
Reviewed-on: https://chromium-review.googlesource.com/575294Reviewed-by: Kazuhiro Inaba <kinaba@chromium.org>
Commit-Queue: Kazuhiro Inaba <kinaba@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487392}