Encrypted Media: Use uint32 for systemCode in SessionError.

media/cdm/ppapi/external_clear_key/clear_key_cdm.h

 // 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.
 
 #ifndef MEDIA_CDM_PPAPI_EXTERNAL_CLEAR_KEY_CLEAR_KEY_CDM_H_
 #define MEDIA_CDM_PPAPI_EXTERNAL_CLEAR_KEY_CLEAR_KEY_CDM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 63 matching lines @@
 
   // ContentDecryptionModule callbacks.
   void OnSessionCreated(uint32 session_id, const std::string& web_session_id);
   void OnSessionMessage(uint32 session_id,
                         const std::vector<uint8>& message,
                         const std::string& destination_url);
   void OnSessionReady(uint32 session_id);
   void OnSessionClosed(uint32 session_id);
   void OnSessionError(uint32 session_id,
                       MediaKeys::KeyError error_code,
-                      int system_code);
+                      uint32 system_code);
 
   // Prepares next heartbeat message and sets a timer for it.
   void ScheduleNextHeartBeat();
 
   // Decrypts the |encrypted_buffer| and puts the result in |decrypted_buffer|.
   // Returns cdm::kSuccess if decryption succeeded. The decrypted result is
   // put in |decrypted_buffer|. If |encrypted_buffer| is empty, the
   // |decrypted_buffer| is set to an empty (EOS) buffer.
   // Returns cdm::kNoKey if no decryption key was available. In this case
   // |decrypted_buffer| should be ignored by the caller.
@@ skipping 57 matching lines @@
   scoped_ptr<CdmVideoDecoder> video_decoder_;
 
   scoped_ptr<FileIOTestRunner> file_io_test_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ClearKeyCdm);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CDM_PPAPI_EXTERNAL_CLEAR_KEY_CLEAR_KEY_CDM_H_