Reland "Re-enable WebRtcAudioQualityBrowserTest on Windows."

This reverts commit 53ccc526.

Reason for revert: Now has diagnostic uploading, so we'll at least be able
to tell why it fails if it's still failing. I've also tried tweaking
the sound config on the machine.

Bug: chromium:677256
Change-Id: I96cdf15eff0b9d1e09053560ac5e4c518abc5caa
Reviewed-on: https://chromium-review.googlesource.com/826942Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Patrik Höglund <phoglund@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524044}

chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc

@@ -66,12 +66,10 @@ 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