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

core/fpdftext/fpdf_text_int.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 "core/fpdftext/fpdf_text_int.h"
 
 #include <algorithm>
 #include <cctype>
@@ skipping 2167 matching lines @@
       if (_IsIgnoreSpaceCharacter(curChar)) {
         if (pos > 0 && curChar == 0x2019) {
           pos++;
           continue;
         }
         if (pos > 0) {
           m_csFindWhatArray.push_back(csWord.Mid(0, pos));
         }
         m_csFindWhatArray.push_back(curStr);
         if (pos == csWord.GetLength() - 1) {
-          csWord.Empty();
+          csWord.clear();
           break;
         }
         csWord = csWord.Right(csWord.GetLength() - pos - 1);
         pos = 0;
         continue;
       }
       pos++;
     }
     if (!csWord.IsEmpty()) {
       m_csFindWhatArray.push_back(csWord);
@@ skipping 52 matching lines @@
 FX_BOOL CPDF_TextPageFind::ExtractSubString(CFX_WideString& rString,
                                             const FX_WCHAR* lpszFullString,
                                             int iSubString,
                                             FX_WCHAR chSep) {
   if (!lpszFullString) {
     return FALSE;
   }
   while (iSubString--) {
     lpszFullString = FXSYS_wcschr(lpszFullString, chSep);
     if (!lpszFullString) {
-      rString.Empty();
+      rString.clear();
       return FALSE;
     }
     lpszFullString++;
     while (*lpszFullString == chSep) {
       lpszFullString++;
     }
   }
   const FX_WCHAR* lpchEnd = FXSYS_wcschr(lpszFullString, chSep);
   int nLen = lpchEnd ? (int)(lpchEnd - lpszFullString)
                      : (int)FXSYS_wcslen(lpszFullString);
   ASSERT(nLen >= 0);
   FXSYS_memcpy(rString.GetBuffer(nLen), lpszFullString,
                nLen * sizeof(FX_WCHAR));
   rString.ReleaseBuffer();
   return TRUE;
 }
 
 CFX_WideString CPDF_TextPageFind::MakeReverse(const CFX_WideString& str) {
   CFX_WideString str2;
-  str2.Empty();
+  str2.clear();
   int nlen = str.GetLength();
   for (int i = nlen - 1; i >= 0; i--) {
     str2 += str.GetAt(i);
   }
   return str2;
 }
 
 void CPDF_TextPageFind::GetRectArray(CFX_RectArray& rects) const {
   rects.Copy(m_resArray);
 }
@@ skipping 219 matching lines @@
   if (!m_bIsParsed || index < 0 || index >= m_LinkList.GetSize()) {
     return;
   }
   CPDF_LinkExt* link = NULL;
   link = m_LinkList.GetAt(index);
   if (!link) {
     return;
   }
   m_pTextPage->GetRectArray(link->m_Start, link->m_Count, rects);
 }