Chromecast: Add media_caps.h to unblock internal builds

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
new file mode 100644
index 0000000000000000000000000000000000000000..3590756b9f94df46c6ca8d00e25fbf741ef39414
--- /dev/null
+++ b/chromecast/media/base/media_caps.h
@@ -0,0 +1,19 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMECAST_MEDIA_BASE_MEDIA_CAPS_
+#define CHROMECAST_MEDIA_BASE_MEDIA_CAPS_
+
+namespace media {
+
+bool HdmiSinkSupportsAC3();
+bool HdmiSinkSupportsDTS();
+bool HdmiSinkSupportsDTSHD();
+bool HdmiSinkSupportsEAC3();
+bool HdmiSinkSupportsPcmSurroundSound();
+
+}  // namespace media
+
+#endif  // CHROMECAST_MEDIA_BASE_MEDIA_CAPS_
+