Revert "Reland "Re-enable webrtc audio quality browsertests on windows.""

This reverts commit c36d213a.

Reason for revert: The bot does not have the needed audio driver to run this test.

Original change's description:
> Reland "Re-enable webrtc audio quality browsertests on windows."
> 
> This is a reland of a3ec8289
> 
> Original change's description:
> > Re-enable webrtc audio quality browsertests on windows.
> > 
> > Tests were previously disabled when they started failing (more context in linked bug). Re-enabling because tests pass locally on win7 machine.
> > 
> > Bug: 850936
> > Change-Id: Ie1ab4e82daf2c0265e932237d3edf6b3399ee803
> > Reviewed-on: https://chromium-review.googlesource.com/1139066
> > Reviewed-by: Henrik Boström <hbos@chromium.org>
> > Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#575638}
> 
> Bug: 850936
> Change-Id: I44be2227ffed90d25549669de4dd3f354a98d92a
> Reviewed-on: https://chromium-review.googlesource.com/1156224
> Reviewed-by: Henrik Boström <hbos@chromium.org>
> Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#579344}

TBR=hbos@chromium.org,marinaciocea@chromium.org

Change-Id: I30ce4fe93a7787cb5cca85fcf969c254e829dd74
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 850936
Reviewed-on: https://chromium-review.googlesource.com/1156344Reviewed-by: Marina Ciocea <marinaciocea@chromium.org>
Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579350}

chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc

@@ -66,7 +66,8 @@ const int kMaxAgcSegmentDiffMs =
   200;
 #endif
 
-#if defined(OS_LINUX) || defined(OS_WIN) || defined(OS_MACOSX)
+// Temporarily disabled on Win (https://crbug.com/850936).
+#if defined(OS_LINUX) || defined(OS_MACOSX)
 #define MAYBE_WebRtcAudioQualityBrowserTest WebRtcAudioQualityBrowserTest
 #else
 // Not implemented on Android, ChromeOS etc.