Make code compile with clang_use_chrome_plugin (part II)

core/fxcrt/fx_bidi.h

 // 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
 
 #ifndef CORE_FXCRT_FX_BIDI_H_
 #define CORE_FXCRT_FX_BIDI_H_
 
 #include <memory>
@@ skipping 31 matching lines @@
  private:
   void StartNewSegment(CFX_BidiChar::Direction direction);
 
   Segment m_CurrentSegment;
   Segment m_LastSegment;
 };
 
 class CFX_BidiString {
  public:
   using const_iterator = std::vector<CFX_BidiChar::Segment>::const_iterator;
+
   explicit CFX_BidiString(const CFX_WideString& str);
+  ~CFX_BidiString();
 
   // Overall direction is always LEFT or RIGHT, never NEUTRAL.
   CFX_BidiChar::Direction OverallDirection() const {
     return m_eOverallDirection;
   }
 
   // Force the overall direction to be R2L regardless of what was detected.
   void SetOverallDirectionRight();
 
   FX_WCHAR CharAt(size_t x) const { return m_Str[x]; }
   const_iterator begin() const { return m_Order.begin(); }
   const_iterator end() const { return m_Order.end(); }
 
  private:
   const CFX_WideString m_Str;
   std::unique_ptr<CFX_BidiChar> m_pBidiChar;
   std::vector<CFX_BidiChar::Segment> m_Order;
   CFX_BidiChar::Direction m_eOverallDirection;
 };
 
 #endif  // CORE_FXCRT_FX_BIDI_H_