[Chromecast] Add a custom CastMediaClient for Chromecast

chromecast/media/base/cast_media_dummy.cc

Index: chromecast/media/base/cast_media_dummy.cc
diff --git a/chromecast/media/base/cast_media_dummy.cc b/chromecast/media/base/cast_media_dummy.cc
index 3060672b7285289a94fa7f3b5127dc1bdcfde4e8..8d3d80b7d1310b96fb194f21e1cbed710c53866d 100644
--- a/chromecast/media/base/cast_media_dummy.cc
+++ b/chromecast/media/base/cast_media_dummy.cc
@@ -28,6 +28,14 @@ MediaCodecSupportShlib::CodecSupport MediaCodecSupportShlib::IsSupported(
   return kDefault;
 }
 
+bool MediaCapabilitiesShlib::IsSupportedVideoConfig(VideoCodec codec,
+                                                    VideoProfile profile,
+                                                    int level) {
+  if (codec == kCodecH264 || codec == kCodecVP8)
+    return true;
+  return false;
+}
+
 double CastMediaShlib::GetMediaClockRate() {
   return 0.0;
 }