Encrypted Media: Use uint32 for systemCode in SessionError.

media/base/android/media_player_manager.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_ANDROID_MEDIA_PLAYER_MANAGER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_PLAYER_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 95 matching lines @@
   // Called when MediaDrmBridge wants to send a Ready event.
   virtual void OnSessionReady(int cdm_id, uint32 session_id) = 0;
 
   // Called when MediaDrmBridge wants to send a Closed event.
   virtual void OnSessionClosed(int cdm_id, uint32 session_id) = 0;
 
   // Called when MediaDrmBridge wants to send an Error event.
   virtual void OnSessionError(int cdm_id,
                               uint32 session_id,
                               media::MediaKeys::KeyError error_code,
-                              int system_code) = 0;
+                              uint32 system_code) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_PLAYER_MANAGER_H_