Reland "[Flash] Remove PPP_Flash_BrowserOperations API"

This is a reland of acfed35ea9d8c0488c943832fd0ec5d5c43541ed

Original change's description:
> [Flash] Remove PPP_Flash_BrowserOperations API
>
> This also removes plugin data and settings persistence, which isn't
> needed if the Flash plugin doesn't exist (it used to persist its own
> data on command from the browser.)
>
> Adds a TODO to figure out how we will remove plugin data now that
> Flash is deprecated.
>
> Bug: chromium:1064652,chromium:1135773,chromium:1135779
> Change-Id: I2eb1e30856071190cba29cea98cdd86a37722f95
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450057
> Commit-Queue: Bill Budge <bbudge@chromium.org>
> Reviewed-by: Tom Sepez <tsepez@chromium.org>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Anthony LaForge <laforge@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#816370}

TBR=sky@chromium.org,tsepez@chromium.org,laforge@chromium.org

Bug: chromium:1064652
Bug: chromium:1135773
Bug: chromium:1135779
Change-Id: I3e602eb6915d84becc9e104eb273c924f3cec87f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2468179
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816681}
GitOrigin-RevId: 781e9e3c55975f208985cac5b3f0ce2f86da962f
11 files changed