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It was causing too many problems like being unable to inspect background
tabs in chrome://accessibility and losing your place when switching tabs.
We should come up with a better fix.

Original change: crrev.com/c/1107207

TBR=nektar@chromium.org

Bug: 854411, 856163, 856160
Change-Id: Iaef9b8ccbd47defba02e4e887f8219d00e77a808
Reviewed-on: https://chromium-review.googlesource.com/1131846Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573876}