Replace calls to deprecated CFX_{Wide,Byte}String::Empty()

xfa/fwl/basewidget/fwl_editimp.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/fwl/basewidget/fwl_editimp.h"
 
 #include <algorithm>
 #include <vector>
@@ skipping 441 matching lines @@
       }
       sLatinWord += (FX_CHAR)wsSpell[i];
     } else {
       checkWordEvent.bsWord = sLatinWord;
       checkWordEvent.bCheckWord = TRUE;
       DispatchEvent(&checkWordEvent);
       if (!sLatinWord.IsEmpty() && !checkWordEvent.bCheckWord) {
         AddSpellCheckObj(pathSpell, nStart, sLatinWord.GetLength(), fOffSetX,
                          fOffSetY);
       }
-      sLatinWord.Empty();
+      sLatinWord.clear();
     }
   }
   checkWordEvent.bsWord = sLatinWord;
   checkWordEvent.bCheckWord = TRUE;
   DispatchEvent(&checkWordEvent);
   if (!sLatinWord.IsEmpty() && !checkWordEvent.bCheckWord) {
     AddSpellCheckObj(pathSpell, nStart, sLatinWord.GetLength(), fOffSetX,
                      fOffSetY);
   }
   if (!pathSpell.IsEmpty()) {
@@ skipping 181 matching lines @@
   }
   return FWL_ERR_Indefinite;
 }
 FX_BOOL CFWL_EditImp::Copy(CFX_WideString& wsCopy) {
   if (!m_pEdtEngine)
     return FALSE;
   int32_t nCount = m_pEdtEngine->CountSelRanges();
   if (nCount == 0) {
     return FALSE;
   }
-  wsCopy.Empty();
+  wsCopy.clear();
   CFX_WideString wsTemp;
   int32_t nStart, nLength;
   for (int32_t i = 0; i < nCount; i++) {
     nLength = m_pEdtEngine->GetSelRange(i, nStart);
     m_pEdtEngine->GetText(wsTemp, nStart, nLength);
     wsCopy += wsTemp;
-    wsTemp.Empty();
+    wsTemp.clear();
   }
   return TRUE;
 }
 FX_BOOL CFWL_EditImp::Cut(CFX_WideString& wsCut) {
   if (!m_pEdtEngine)
     return FALSE;
   int32_t nCount = m_pEdtEngine->CountSelRanges();
   if (nCount == 0) {
     return FALSE;
   }
-  wsCut.Empty();
+  wsCut.clear();
   CFX_WideString wsTemp;
   int32_t nStart, nLength;
   for (int32_t i = 0; i < nCount; i++) {
     nLength = m_pEdtEngine->GetSelRange(i, nStart);
     m_pEdtEngine->GetText(wsTemp, nStart, nLength);
     wsCut += wsTemp;
-    wsTemp.Empty();
+    wsTemp.clear();
   }
   m_pEdtEngine->Delete(0);
   return TRUE;
 }
 FX_BOOL CFWL_EditImp::Paste(const CFX_WideString& wsPaste) {
   if (!m_pEdtEngine)
     return FALSE;
   int32_t nCaret = m_pEdtEngine->GetCaretPos();
   int32_t iError =
       m_pEdtEngine->Insert(nCaret, wsPaste.c_str(), wsPaste.GetLength());
@@ skipping 1470 matching lines @@
     }
     CFX_RectF rect;
     m_pOwner->GetWidgetRect(rect);
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, rect.width + 2, rect.height + 2);
     m_pOwner->Repaint(&rtInvalidate);
   }
   return TRUE;
 }
 void CFWL_EditImpDelegate::DoCursor(CFWL_MsgMouse* pMsg) {}