Make down-conversion explicit from CFX_ByteString to CFX_ByteStringC.

fpdfsdk/pdfwindow/PWL_ListBox.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 "fpdfsdk/pdfwindow/PWL_ListBox.h"
 
 #include "fpdfsdk/pdfwindow/PWL_Edit.h"
 #include "fpdfsdk/pdfwindow/PWL_EditCtrl.h"
@@ skipping 100 matching lines @@
   if (m_pList) {
     CFX_FloatRect rcPlate = m_pList->GetPlateRect();
     for (int32_t i = 0, sz = m_pList->GetCount(); i < sz; i++) {
       CFX_FloatRect rcItem = m_pList->GetItemRect(i);
 
       if (rcItem.bottom > rcPlate.top || rcItem.top < rcPlate.bottom)
         continue;
 
       CFX_FloatPoint ptOffset(rcItem.left, (rcItem.top + rcItem.bottom) * 0.5f);
       if (m_pList->IsItemSelected(i)) {
-        sListItems << CPWL_Utils::GetRectFillAppStream(
-            rcItem, PWL_DEFAULT_SELBACKCOLOR);
+        sListItems << CPWL_Utils::GetRectFillAppStream(rcItem,
+                                                       PWL_DEFAULT_SELBACKCOLOR)
+                          .AsByteStringC();
         CFX_ByteString sItem =
             CPWL_Utils::GetEditAppStream(m_pList->GetItemEdit(i), ptOffset);
         if (sItem.GetLength() > 0) {
           sListItems << "BT\n"
                      << CPWL_Utils::GetColorAppStream(PWL_DEFAULT_SELTEXTCOLOR)
-                     << sItem << "ET\n";
+                            .AsByteStringC()
+                     << sItem.AsByteStringC() << "ET\n";
         }
       } else {
         CFX_ByteString sItem =
             CPWL_Utils::GetEditAppStream(m_pList->GetItemEdit(i), ptOffset);
         if (sItem.GetLength() > 0) {
-          sListItems << "BT\n" << CPWL_Utils::GetColorAppStream(GetTextColor())
-                     << sItem << "ET\n";
+          sListItems << "BT\n"
+                     << CPWL_Utils::GetColorAppStream(GetTextColor())
+                            .AsByteStringC()
+                     << sItem.AsByteStringC() << "ET\n";
         }
       }
     }
   }
 
   if (sListItems.GetLength() > 0) {
     CFX_ByteTextBuf sClip;
     CFX_FloatRect rcClient = GetClientRect();
 
     sClip << "q\n";
@@ skipping 378 matching lines @@
   if (zDelta < 0) {
     m_pList->OnVK_DOWN(IsSHIFTpressed(nFlag), IsCTRLpressed(nFlag));
   } else {
     m_pList->OnVK_UP(IsSHIFTpressed(nFlag), IsCTRLpressed(nFlag));
   }
 
   FX_BOOL bExit = FALSE;
   OnNotifySelChanged(FALSE, bExit, nFlag);
   return TRUE;
 }