[chromecast] Add cast_shell --accept-resource-provider switch

chromecast/media/cma/backend/alsa/stream_mixer_alsa.cc

Index: chromecast/media/cma/backend/alsa/stream_mixer_alsa.cc
diff --git a/chromecast/media/cma/backend/alsa/stream_mixer_alsa.cc b/chromecast/media/cma/backend/alsa/stream_mixer_alsa.cc
index 2f1afc7f9d41a45cb4cbe59754ca1fec65ae1e95..08c203647b16394813d3a456e83240ac06974f61 100644
--- a/chromecast/media/cma/backend/alsa/stream_mixer_alsa.cc
+++ b/chromecast/media/cma/backend/alsa/stream_mixer_alsa.cc
@@ -256,9 +256,13 @@ void StreamMixerAlsa::DefineAlsaParameters() {
   }
   alsa_avail_min_ = avail_min;
 
+  // --accept-resource-provider should imply a check close timeout of 0.
+  int default_close_timeout =
+      base::GetSwitchValueBoolean(switches::kAcceptResourceProvider, false)
+          ? 0
+          : kDefaultCheckCloseTimeoutMs;
   GetSwitchValueAsNonNegativeInt(switches::kAlsaCheckCloseTimeout,
-                                 kDefaultCheckCloseTimeoutMs,
-                                 &check_close_timeout_);
+                                 default_close_timeout, &check_close_timeout_);
 }
 
 int StreamMixerAlsa::SetAlsaPlaybackParams() {