Revert "Temporarily disable webaudio/DynamicsCompressor/compressor.html"

This reverts commit a954ef5f.

Reason for revert: https://crrev.com/c/2569026 has been reverted

Original change's description:
> Temporarily disable webaudio/DynamicsCompressor/compressor.html
>
> New test, fails on Mac.
>
> TBR: rtoy
> Bug: 1154883
> Change-Id: I64534e6aa5ee39f928ff7a8c4df21b64a5e70901
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570019
> Reviewed-by: Dmitry Titov <dimich@chromium.org>
> Reviewed-by: Raymond Toy <rtoy@chromium.org>
> Commit-Queue: Dmitry Titov <dimich@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#833057}

TBR=dimich@chromium.org,rtoy@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: Id448bf98326e5dec2d917d2c90e18a7f286fe955
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1154883
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568998Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833075}

third_party/blink/web_tests/TestExpectations

@@ -5979,9 +5979,6 @@ crbug.com/1134459 accessibility/aom-click-action.html [ Pass Timeout ]
 crbug.com/1032451 virtual/threaded-no-composited-antialiasing/animations/stability/animation-iteration-event-destroy-renderer.html [ Pass Timeout ]
 crbug.com/931646 [ Mac ] http/tests/preload/meta-viewport-link-headers-imagesrcset.html [ Failure Pass ]
 
-#Sheriff 2020-12-02
-crbug.com/1154883 [ Mac ] webaudio/DynamicsCompressor/compressor.html [ Failure Pass ]
-
 # These tests will only run in the virtual test suite where the frequency
 # capping for overlay popup detection is disabled. This eliminates the need
 # for waitings in web tests to trigger a detection event.