Load CMA backend from shared library

chromecast/media/cma/base/cast_decrypt_config_impl.h

Index: chromecast/media/cma/base/cast_decrypt_config_impl.h
diff --git a/chromecast/media/cma/base/cast_decrypt_config_impl.h b/chromecast/media/cma/base/cast_decrypt_config_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..b78494bb4ccd30e7933be19191dd0d5b622fb439
--- /dev/null
+++ b/chromecast/media/cma/base/cast_decrypt_config_impl.h
@@ -0,0 +1,39 @@
+// Copyright 2015 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_CMA_BASE_CAST_DECRYPT_CONFIG_IMPL_H_
+#define CHROMECAST_MEDIA_CMA_BASE_CAST_DECRYPT_CONFIG_IMPL_H_
+
+#include "chromecast/public/media/cast_decrypt_config.h"
+
+namespace media {
+class DecryptConfig;
+}
+
+namespace chromecast {
+namespace media {
+
+// Contains all information that a decryptor needs to decrypt a media sample.
+class CastDecryptConfigImpl : public CastDecryptConfig {
+ public:
+  CastDecryptConfigImpl(const ::media::DecryptConfig& config);
+  CastDecryptConfigImpl(const std::string& key_id,
+                        const std::string& iv,
+                        const std::vector<SubsampleEntry>& subsamples);
+  ~CastDecryptConfigImpl() override;
+
+  const std::string& key_id() const override;
+  const std::string& iv() const override;
+  const std::vector<SubsampleEntry>& subsamples() const override;
+
+ private:
+  std::string key_id_;
+  std::string iv_;
+  std::vector<SubsampleEntry> subsamples_;
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_CAST_DECRYPT_CONFIG_IMPL_H_