Introduce CdmContext interface.

media/cdm/aes_decryptor.cc

 // Copyright 2013 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 "media/cdm/aes_decryptor.h"
 
 #include <list>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 366 matching lines @@
   base::AutoLock auto_lock(key_map_lock_);
   for (KeyIdToSessionKeysMap::iterator it = key_map_.begin();
        it != key_map_.end();
        ++it) {
     if (it->second->Contains(web_session_id))
       keyids.push_back(std::vector<uint8>(it->first.begin(), it->first.end()));
   }
   promise->resolve(keyids);
 }
 
+CdmContext* AesDecryptor::GetCdmContext() {
+  return this;
+}
+
 Decryptor* AesDecryptor::GetDecryptor() {
   return this;
 }
 
 #if defined(ENABLE_BROWSER_CDMS)
 int AesDecryptor::GetCdmId() const {
   return kInvalidCdmId;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
@@ skipping 147 matching lines @@
 bool AesDecryptor::DecryptionKey::Init() {
   CHECK(!secret_.empty());
   decryption_key_.reset(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, secret_));
   if (!decryption_key_)
     return false;
   return true;
 }
 
 }  // namespace media