Chromecast: communicate HDMI-sink codec changes over IPC.

chromecast/media/base/media_caps.h

Index: chromecast/media/base/media_caps.h
diff --git a/chromecast/media/base/media_caps.h b/chromecast/media/base/media_caps.h
index 8e137986dabe44ad035e4bbd603ccd3c7d49f1b5..8ae2c7bcec0dae3c27bc33c4f1b1e029c4ea7f15 100644
--- a/chromecast/media/base/media_caps.h
+++ b/chromecast/media/base/media_caps.h
@@ -7,6 +7,18 @@
 
 namespace media {
 
+enum HdmiSinkCodec {
+  kSinkCodecAc3 = 1,
+  kSinkCodecDts = 1 << 1,
+  kSinkCodecDtsHd = 1 << 2,
+  kSinkCodecEac3 = 1 << 3,
+  kSinkCodecPcmSurroundSound = 1 << 4,
+};
+
+// Records the known supported codecs for the current HDMI sink, as a bit mask
+// of HdmiSinkCodec values.
+void SetHdmiSinkCodecs(int codecs_mask);
+
 bool HdmiSinkSupportsAC3();
 bool HdmiSinkSupportsDTS();
 bool HdmiSinkSupportsDTSHD();