GitLab

Before using the audio service, check that the AUDIO feature flag is
enabled.

Test: WebEngineIntegrationTest.PlayAudio*
Bug: 1070571
Change-Id: I4f88887e24dd899748fa7959875b5c2b5753eee3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2365992Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Commit-Queue: Sharon Yang <yangsharon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807189}