Plugin Power Saver: Allow Enterprise ASK policy users to manually play.

- In M42, we removed ASK (Left click to play) for plugins and
  interpreted all ASK users as BLOCK.

- For users on BLOCK via policy, the manually play option is grayed out,
  presumably because enterprise admins don't want users to be able to
  override their policies.

- This has the unintended consequence of causing managed ASK users to be
  unable to play plugins.

- That seems against admin intent, and this patch allows legacy ASK
  policy users to right click to play.

- This is a minimal patch intended to be merged into M42 and M43.

BUG=477625

Review URL: https://codereview.chromium.org/1092143003

Cr-Commit-Position: refs/heads/master@{#326050}
1 file changed