Never enable Switch Access unless the experimental flag is enabled.

A few users seem to be getting Switch Access enabled by accident.
Somehow the pref is set, even though they never explicitly enabled it.
This is especially confusing because without the "experimental accessibility
apis" flag set, you can't even see the Setting.

Fix this by checking the flag before loading Switch Access. This should
prevent all accidental or unwanted loading of this feature.

Bug: 761047
Change-Id: Id24fc8aad8f790b260ac0f1e08c1bc8a04d2562a
Reviewed-on: https://chromium-review.googlesource.com/646078
Commit-Queue: Dominic Mazzoni <[email protected]>
Reviewed-by: David Tseng <[email protected]>
Cr-Commit-Position: refs/heads/master@{#498937}
1 file changed