Make down-conversion explicit from CFX_ByteString to CFX_ByteStringC.

xfa/fxfa/parser/xfa_script_eventpseudomodel.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fxfa/parser/xfa_script_eventpseudomodel.h"
 
 #include "xfa/fxfa/app/xfa_ffnotify.h"
 #include "xfa/fxfa/fm2js/xfa_fm2jsapi.h"
@@ skipping 16 matching lines @@
 }
 CScript_EventPseudoModel::~CScript_EventPseudoModel() {}
 void Script_EventPseudoModel_StringProperty(FXJSE_HVALUE hValue,
                                             CFX_WideString& wsValue,
                                             FX_BOOL bSetting) {
   if (bSetting) {
     CFX_ByteString bsValue;
     FXJSE_Value_ToUTF8String(hValue, bsValue);
     wsValue = CFX_WideString::FromUTF8(bsValue, bsValue.GetLength());
   } else {
-    FXJSE_Value_SetUTF8String(hValue, FX_UTF8Encode(wsValue));
+    FXJSE_Value_SetUTF8String(hValue, FX_UTF8Encode(wsValue).AsByteStringC());
   }
 }
 void Script_EventPseudoModel_InterProperty(FXJSE_HVALUE hValue,
                                            int32_t& iValue,
                                            FX_BOOL bSetting) {
   if (bSetting) {
     iValue = FXJSE_Value_ToInteger(hValue);
   } else {
     FXJSE_Value_SetInteger(hValue, iValue);
   }
@@ skipping 217 matching lines @@
   CXFA_ScriptContext* pScriptContext = m_pDocument->GetScriptContext();
   if (!pScriptContext) {
     return;
   }
   CXFA_EventParam* pEventParam = pScriptContext->GetEventParam();
   if (!pEventParam) {
     return;
   }
   pEventParam->Reset();
 }