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This reverts commit 3bb52934.

Reason for revert: https://bugs.chromium.org/p/chromium/issues/detail?id=1064732

Original change's description:
> Fix use of invalid DisplaySnapshot pointer while updating HDCP
> 
> HDCP updates are asynchronous. Do not pass display state pointers
> between async calls since display configuration may have changed.
> 
> Instead query the display state and validate that the requested
> displays are valid.
> 
> BUG=1058030
> TEST=display_unittest
> 
> Change-Id: I7e037a44f06156b5b1da3f2672330ba8a18ca950
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2118771
> Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
> Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#753203}

TBR=oshima@chromium.org,dnicoara@chromium.org

Change-Id: I57fd6ee3708900914c15e8b844dc8ad772ec35e1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1058030
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2121084Reviewed-by: Peng Huang <penghuang@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753351}