Disable low latency audio under remote desktop sessions.

media/audio/win/core_audio_util_win.cc

Index: media/audio/win/core_audio_util_win.cc
diff --git a/media/audio/win/core_audio_util_win.cc b/media/audio/win/core_audio_util_win.cc
index b56d6e6a6e13f9ef749ec4ac57c5e5111c102164..5c6bc7426da8b177a285ffce6b93bcac7ac5911e 100644
--- a/media/audio/win/core_audio_util_win.cc
+++ b/media/audio/win/core_audio_util_win.cc
@@ -170,6 +170,17 @@ bool CoreAudioUtil::IsSupported() {
   if (base::win::GetVersion() < base::win::VERSION_VISTA)
     return false;
 
+  // Don't use CoreAudio when a remote desktop session is present; several users
+  // report only WaveAudio working for them and crash reports show hangs when
+  // calling into the OS for CoreAudio API calls. See http://crbug.com/422522
+  // and http://crbug.com/180591.
+  //
+  // Note: It's possible that a user will connect a remote desktop session after
+  // this check has been done. In practice this shouldn't be the dominant case
+  // though and CoreAudio does work for many users.
+  if (GetSystemMetrics(SM_REMOTESESSION))

[henrika (OOO until Aug 14), 2015/04/05 14:41:08]

This is the only detection method I could find as well. I have no better idea.

+    return false;
+
   // The audio core APIs are implemented in the Mmdevapi.dll and Audioses.dll
   // system components.
   // Dependency Walker shows that it is enough to verify possibility to load