Remove FX_BOOL from core

core/fpdftext/cpdf_linkextract.cpp

 // Copyright 2016 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/cpdf_linkextract.h"
 
 #include <vector>
 
@@ skipping 90 matching lines @@
   // Check the local part.
   int pPos = aPos;  // Used to track the position of '@' or '.'.
   for (int i = aPos - 1; i >= 0; i--) {
     FX_WCHAR ch = str.GetAt(i);
     if (ch == L'_' || ch == L'-' || FXSYS_iswalnum(ch))
       continue;
 
     if (ch != L'.' || i == pPos - 1 || i == 0) {
       if (i == aPos - 1) {
         // There is '.' or invalid char before '@'.
-        return FALSE;
+        return false;
       }
       // End extracting for other invalid chars, '.' at the beginning, or
       // consecutive '.'.
       int removed_len = i == pPos - 1 ? i + 2 : i + 1;
       str = str.Right(str.GetLength() - removed_len);
       break;
     }
     // Found a valid '.'.
     pPos = i;
   }
@@ skipping 42 matching lines @@
   return index < m_LinkArray.size() ? m_LinkArray[index].m_strUrl : L"";
 }
 
 std::vector<CFX_FloatRect> CPDF_LinkExtract::GetRects(size_t index) const {
   if (index >= m_LinkArray.size())
     return std::vector<CFX_FloatRect>();
 
   return m_pTextPage->GetRectArray(m_LinkArray[index].m_Start,
                                    m_LinkArray[index].m_Count);
 }