Load CMA backend from shared library

chromecast/media/base/decrypt_context_impl.cc

+// 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.
+
+#include "chromecast/media/base/decrypt_context_impl.h"
+
+namespace chromecast {
+namespace media {
+
+DecryptContextImpl::DecryptContextImpl(CastKeySystem key_system)
+    : key_system_(key_system) {}
+
+DecryptContextImpl::~DecryptContextImpl() {}
+
+CastKeySystem DecryptContextImpl::GetKeySystem() {
+  return key_system_;
+}
+
+bool DecryptContextImpl::Decrypt(CastDecoderBuffer* buffer,
+                                 std::vector<uint8_t>* output) {
+  return false;
+}
+
+crypto::SymmetricKey* DecryptContextImpl::GetKey() const {
+  return NULL;
+}
+
+}  // namespace media
+}  // namespace chromecast