Update TestExpectations for toggle-class-with-state-source.html

This CL updates the TestExpectation for the
toggle-class-with-state-source.html test to also include
virtual/audio-service

Bug: 981303
Change-Id: Ifd3c452299d55ccd90aebb00d1830f8694334999
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829238Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700823}

third_party/blink/web_tests/TestExpectations

@@ -5975,6 +5975,7 @@ crbug.com/981210 external/wpt/web-animations/interfaces/Animation/oncancel.html
 # Sheriff 2019-07-04
 crbug.com/981267 [ Linux ] http/tests/devtools/persistence/persistence-move-breakpoints-on-reload.js [ Pass Failure ]
 crbug.com/981303 [ Mac ] http/tests/media/controls/toggle-class-with-state-source.html [ Pass Timeout ]
+crbug.com/981303 [ Mac ] virtual/audio-service/http/tests/media/controls/toggle-class-with-state-source.html [ Pass Timeout ]
 crbug.com/981331 fast/forms/form-submission-create-crash.xhtml [ Pass Timeout ]
 # TODO(crbug.com/980588): reenable once WPT is fixed
 crbug.com/980588 external/wpt/screen-orientation/lock-unlock-check.html [ Pass Failure ]