Encrypted Media: Use uint32 for systemCode in SessionError.

content/renderer/media/webcontentdecryptionmodulesession_impl.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/webcontentdecryptionmodulesession_impl.h"
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "content/renderer/media/cdm_session_adapter.h"
@@ skipping 68 matching lines @@
 void WebContentDecryptionModuleSessionImpl::OnSessionReady() {
   client_->ready();
 }
 
 void WebContentDecryptionModuleSessionImpl::OnSessionClosed() {
   client_->close();
 }
 
 void WebContentDecryptionModuleSessionImpl::OnSessionError(
     media::MediaKeys::KeyError error_code,
-    int system_code) {
+    uint32 system_code) {
   client_->error(static_cast<Client::MediaKeyErrorCode>(error_code),
                  system_code);
 }
 
 }  // namespace content