Introduce VideoConfig/AudioConfig class for CMA backend

chromecast/public/media/decoder_config.cc

Index: chromecast/public/media/decoder_config.cc
diff --git a/media/base/media_permission.cc b/chromecast/public/media/decoder_config.cc
similarity index 55%
copy from media/base/media_permission.cc
copy to chromecast/public/media/decoder_config.cc
index 739e4454ae76be702c1ddde201fc9680575d9c9e..cfafb73309cf4ced7b95fcf37ca4810cd04f547a 100644
--- a/media/base/media_permission.cc
+++ b/chromecast/public/media/decoder_config.cc
@@ -2,14 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/base/media_permission.h"
+#include "chromecast/public/media/decoder_config.h"
 
+namespace chromecast {
 namespace media {
 
-MediaPermission::MediaPermission() {
-}
-
-MediaPermission::~MediaPermission() {
-}
+DecoderConfig::DecoderConfig() {}
+DecoderConfig::~DecoderConfig() {}
 
 }  // namespace media
+}  // namespace chromecast