Load CMA backend from shared library

chromecast/media/base/decrypt_context_impl_clearkey.cc

Index: chromecast/media/base/decrypt_context_impl_clearkey.cc
diff --git a/chromecast/media/base/decrypt_context_clearkey.cc b/chromecast/media/base/decrypt_context_impl_clearkey.cc
similarity index 51%
rename from chromecast/media/base/decrypt_context_clearkey.cc
rename to chromecast/media/base/decrypt_context_impl_clearkey.cc
index 248cbb459c68b060a41d82e6535c67efe515c0f8..5ad3e11d50b8e2e8875ddc8e56616281bfe98733 100644
--- a/chromecast/media/base/decrypt_context_clearkey.cc
+++ b/chromecast/media/base/decrypt_context_impl_clearkey.cc
@@ -2,7 +2,7 @@
 // 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_clearkey.h"
+#include "chromecast/media/base/decrypt_context_impl_clearkey.h"
 
 #include "base/logging.h"
 #include "crypto/symmetric_key.h"
@@ -10,16 +10,15 @@
 namespace chromecast {
 namespace media {
 
-DecryptContextClearKey::DecryptContextClearKey(crypto::SymmetricKey* key)
-    : DecryptContext(KEY_SYSTEM_CLEAR_KEY),
-      key_(key) {
+DecryptContextImplClearKey::DecryptContextImplClearKey(
+    crypto::SymmetricKey* key)
+    : DecryptContextImpl(KEY_SYSTEM_CLEAR_KEY), key_(key) {
   CHECK(key);
 }
 
-DecryptContextClearKey::~DecryptContextClearKey() {
-}
+DecryptContextImplClearKey::~DecryptContextImplClearKey() {}
 
-crypto::SymmetricKey* DecryptContextClearKey::GetKey() const {
+crypto::SymmetricKey* DecryptContextImplClearKey::GetKey() const {
   return key_;
 }