Encrypted Media: Use uint32 for systemCode in SessionError.

content/renderer/media/crypto/ppapi_decryptor.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 CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_
 #define CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 77 matching lines @@
 
   // Callbacks for |plugin_cdm_delegate_| to fire session events.
   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,
                       media::MediaKeys::KeyError error_code,
-                      int system_code);
+                      uint32 system_code);
 
   // Callback to notify that a fatal error happened in |plugin_cdm_delegate_|.
   // The error is terminal and |plugin_cdm_delegate_| should not be used after
   // this call.
   void OnFatalPluginError();
 
   ContentDecryptorDelegate* CdmDelegate();
 
   base::WeakPtr<PpapiDecryptor> weak_this_;
 
@@ skipping 16 matching lines @@
   NewKeyCB new_video_key_cb_;
 
   base::WeakPtrFactory<PpapiDecryptor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiDecryptor);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_