Encrypted Media: Use uint32 for systemCode in SessionError.

content/renderer/media/webcontentdecryptionmodulesession_impl.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_WEBCONTENTDECRYPTIONMODULESESSION_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULESESSION_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 27 matching lines @@
                                     size_t init_data_length);
   virtual void update(const uint8* response, size_t response_length);
   virtual void release();
 
   // Callbacks.
   void OnSessionCreated(const std::string& web_session_id);
   void OnSessionMessage(const std::vector<uint8>& message,
                         const std::string& destination_url);
   void OnSessionReady();
   void OnSessionClosed();
-  void OnSessionError(media::MediaKeys::KeyError error_code, int system_code);
+  void OnSessionError(media::MediaKeys::KeyError error_code,
+                      uint32 system_code);
 
  private:
   scoped_refptr<CdmSessionAdapter> adapter_;
 
   // Non-owned pointer.
   Client* client_;
 
   // Web session ID is the app visible ID for this session generated by the CDM.
   // This value is not set until the CDM calls OnSessionCreated().
   blink::WebString web_session_id_;
 
   // Session ID is used to uniquely track this object so that CDM callbacks
   // can get routed to the correct object.
   const uint32 session_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleSessionImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULESESSION_IMPL_H_