Adding experimental exclusive-mode streaming to WASAPIAudioOutputStream

media/base/media_switches.cc

Index: media/base/media_switches.cc
diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index 3d500224f688f043167a2fc7813284ec61730ff1..290333bba7d79c422e6037c162630430478a5827 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -23,6 +23,15 @@ const char kUseCras[] = "use-cras";
 const char kUsePulseAudio[] = "use-pulseaudio";
 #endif
 
+#if defined(OS_WIN)
+// Use exclusive mode audio streaming for Windows Vista and higher.
+// Leads to lower latencies for audio streams which uses the
+// AudioParameters::AUDIO_PCM_LOW_LATENCY audio path.
+// See http://msdn.microsoft.com/en-us/library/windows/desktop/dd370844(v=vs.85).aspx
+// for details.
+const char kEnableExclusiveMode[] = "enable-exclusive-mode";
+#endif
+
 // Set number of threads to use for video decoding.
 const char kVideoThreads[] = "video-threads";