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This reverts commit 13c588bc, to re-land
the original patch (https://chromium-review.googlesource.com/884996)
again. This patch contains fixes needed to restore tab capture
functionality and clear up failing perf waterfall bots.

This time, I'm landing with the "sensitive to random bots not in the CQ"
content_browsertests disabled. I will re-enable them in a separate
change so that people stop reverting this very important fix, the act of
which keeps making things worse elsewhere.

TBR=xjz@chromium.org,kylechar@chromium.org

Bug: 806635, 785072, 754872
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I15ac4faaa168eb57f1775b70148382c3933de82f
Reviewed-on: https://chromium-review.googlesource.com/891541
Commit-Queue: Yuri Wiitala <miu@chromium.org>
Reviewed-by: Yuri Wiitala <miu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532598}