Index: media/audio/win/core_audio_util_win.h |
diff --git a/media/audio/win/core_audio_util_win.h b/media/audio/win/core_audio_util_win.h |
index a210af906ea6e3366aaa1834d7497f572dc075e3..e78467ec3acf6cbef91f36e2426e95485517b544 100644 |
--- a/media/audio/win/core_audio_util_win.h |
+++ b/media/audio/win/core_audio_util_win.h |
@@ -37,6 +37,8 @@ class MEDIA_EXPORT CoreAudioUtil { |
// Returns true if Windows Core Audio is supported. |
// Always verify that this method returns true before using any of the |
// methods in this class. |
+ // WARNING: This function must be called once from the main thread before |
+ // it is safe to call from other threads. |
static bool IsSupported(); |
// Converts between reference time to base::TimeDelta. |