Adds new libcast_media shared library for cast_shell media

chromecast/media/base/cast_media_default.cc

Index: chromecast/media/base/cast_media_default.cc
diff --git a/chromecast/graphics/graphics_properties_default.cc b/chromecast/media/base/cast_media_default.cc
similarity index 54%
copy from chromecast/graphics/graphics_properties_default.cc
copy to chromecast/media/base/cast_media_default.cc
index 200c6cc4b3a5a43c48fefc2363bb79e33bb8eef0..3038db99001fe744e2efbb3350ef9dd99eff97cf 100644
--- a/chromecast/graphics/graphics_properties_default.cc
+++ b/chromecast/media/base/cast_media_default.cc
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chromecast/public/graphics_properties_shlib.h"
+#include "chromecast/public/cast_media_shlib.h"
 
 namespace chromecast {
 
-bool GraphicsPropertiesShlib::IsSupported(
-    Resolution resolution,
-    const std::vector<std::string>& argv) {
-  return true;
+void CastMediaShlib::Initialize(const std::vector<std::string>& argv) {
+}
+
+void CastMediaShlib::Finalize() {
 }
 
 }  // namespace chromecast