Revert "Disables WebRtcAudioQualityBrowserTest on Windows"

This reverts commit 885d259d.

Reason for revert: Need to test new sound card config on win bots.

Original change's description:
> Disables WebRtcAudioQualityBrowserTest on Windows
> 
> TBR=phoglund
> 
> Bug: webrtc:677256
> Change-Id: I84a0fdf08a25204231ee1869918ecbffc8bdca9d
> Reviewed-on: https://chromium-review.googlesource.com/677458
> Reviewed-by: Henrik Andreasson <henrika@chromium.org>
> Commit-Queue: Henrik Andreasson <henrika@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#503516}

TBR=phoglund@chromium.org,henrika@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 677256,737090
Change-Id: Ie41beeec00b3e3fbc7702ba6c7fd8a754c567e18
Reviewed-on: https://chromium-review.googlesource.com/727919Reviewed-by: Patrik Höglund <phoglund@chromium.org>
Reviewed-by: Henrik Andreasson <henrika@chromium.org>
Commit-Queue: Patrik Höglund <phoglund@chromium.org>
Cr-Commit-Position: refs/heads/master@{#510041}

chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc

@@ -62,12 +62,10 @@ const int kMaxAgcSegmentDiffMs =
   200;
 #endif
 
-#if defined(OS_LINUX) || defined(OS_MACOSX)
+#if defined(OS_LINUX) || defined(OS_WIN) || defined(OS_MACOSX)
 #define MAYBE_WebRtcAudioQualityBrowserTest WebRtcAudioQualityBrowserTest
 #else
 // Not implemented on Android, ChromeOS etc.
-// Also disabled on Windows due to
-// https://bugs.chromium.org/p/chromium/issues/detail?id=677256
 #define MAYBE_WebRtcAudioQualityBrowserTest DISABLED_WebRtcAudioQualityBrowserTest
 #endif