Encrypted Media: Use uint32 for systemCode in SessionError.

content/renderer/media/crypto/ppapi_decryptor.cc

 // 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.
 
 #include "content/renderer/media/crypto/ppapi_decryptor.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 347 matching lines @@
   session_ready_cb_.Run(session_id);
 }
 
 void PpapiDecryptor::OnSessionClosed(uint32 session_id) {
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
   session_closed_cb_.Run(session_id);
 }
 
 void PpapiDecryptor::OnSessionError(uint32 session_id,
                                     media::MediaKeys::KeyError error_code,
-                                    int system_code) {
+                                    uint32 system_code) {
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
   session_error_cb_.Run(session_id, error_code, system_code);
 }
 
 void PpapiDecryptor::OnFatalPluginError() {
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
   pepper_cdm_wrapper_.reset();
 }
 
 ContentDecryptorDelegate* PpapiDecryptor::CdmDelegate() {
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
   return (pepper_cdm_wrapper_) ? pepper_cdm_wrapper_->GetCdmDelegate() : NULL;
 }
 
 }  // namespace content