Add "type" in GenerateKeyRequest() and OnNeedKey().

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_BASE_DECRYPTOR_CLIENT_H_
 #define MEDIA_BASE_DECRYPTOR_CLIENT_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 18 matching lines @@
 
   // 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.
+  // TODO(xhwang): Figure out if "type" is optional for NeedKey fired from the
+  // decoder.
   virtual void NeedKey(const std::string& key_system,
                        const std::string& session_id,
+                       const std::string& type,
                        scoped_array<uint8> init_data,
                        int init_data_length) = 0;
 
  protected:
   virtual ~DecryptorClient() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DECRYPTOR_CLIENT_H_