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As a result, removing locks and synchronizations.
Also changing the way we store and report the OOM protected state.
We now update the OOM protected state every time it changes as long as we
are bound (that happens only on the launcher thread).
When retrieving that OOM protected state (which happens on the IO
thread), we return that state directly without the need of a lock.

BUG=714657

Review-Url: https://codereview.chromium.org/2840303002
Cr-Commit-Position: refs/heads/master@{#467892}