Encrypted Media: Use uint32 for systemCode in SessionError.

content/renderer/pepper/content_decryptor_delegate.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 CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_
 #define CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_
 
 #include <queue>
 #include <string>
 
@@ skipping 74 matching lines @@
 
   // PPB_ContentDecryptor_Private dispatching methods.
   void OnSessionCreated(uint32 session_id, PP_Var web_session_id_var);
   void OnSessionMessage(uint32 session_id,
                         PP_Var message,
                         PP_Var destination_url);
   void OnSessionReady(uint32 session_id);
   void OnSessionClosed(uint32 session_id);
   void OnSessionError(uint32 session_id,
                       int32_t media_error,
-                      int32_t system_code);
+                      uint32_t system_code);
   void DeliverBlock(PP_Resource decrypted_block,
                     const PP_DecryptedBlockInfo* block_info);
   void DecoderInitializeDone(PP_DecryptorStreamType decoder_type,
                              uint32_t request_id,
                              PP_Bool success);
   void DecoderDeinitializeDone(PP_DecryptorStreamType decoder_type,
                                uint32_t request_id);
   void DecoderResetDone(PP_DecryptorStreamType decoder_type,
                         uint32_t request_id);
   void DeliverFrame(PP_Resource decrypted_frame,
@@ skipping 108 matching lines @@
 
   base::WeakPtr<ContentDecryptorDelegate> weak_this_;
   base::WeakPtrFactory<ContentDecryptorDelegate> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentDecryptorDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_