Add Decryptor interface.

media/base/decryptor_client.h

 // Copyright (c) 2012 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 MEDIA_CRYPTO_DECRYPTOR_CLIENT_H_
-#define MEDIA_CRYPTO_DECRYPTOR_CLIENT_H_
+#ifndef MEDIA_BASE_DECRYPTOR_CLIENT_H_
+#define MEDIA_BASE_DECRYPTOR_CLIENT_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
-#include "media/crypto/aes_decryptor.h"
+#include "media/base/decryptor.h"
 
 namespace media {
 
 // Interface used by a decryptor to fire key events.
 // See: http://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/encrypted-media.html#event-summary
 class DecryptorClient {
  public:
   // Signals that a key has been added.
   virtual void KeyAdded(const std::string& key_system,
                         const std::string& session_id) = 0;
 
   // Signals that a key error occurred. The |system_code| is key
   // system-dependent. For clear key system, the |system_code| is always zero.
   virtual void KeyError(const std::string& key_system,
                         const std::string& session_id,
-                        AesDecryptor::KeyError error_code,
+                        Decryptor::KeyError error_code,
                         int system_code) = 0;
 
   // Signals that a key message has been generated.
   virtual void KeyMessage(const std::string& key_system,
                           const std::string& session_id,
                           scoped_array<uint8> message,
                           int message_length,
                           const std::string& default_url) = 0;
 
   // Signals that a key is needed for decryption. |key_system| and |session_id|
   // can be empty if the key system has not been selected.
   virtual void NeedKey(const std::string& key_system,
                        const std::string& session_id,
                        scoped_array<uint8> init_data,
                        int init_data_length) = 0;
 
  protected:
   virtual ~DecryptorClient() {}
 };
 
 }  // namespace media
 
-#endif  // MEDIA_CRYPTO_DECRYPTOR_CLIENT_H_
+#endif  // MEDIA_BASE_DECRYPTOR_CLIENT_H_