Make code compile with clang_use_chrome_plugin (part I)

core/fpdfapi/fpdf_edit/fpdf_edit_create.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/fpdfapi/fpdf_edit/editint.h"
 
 #include <vector>
 
@@ skipping 499 matching lines @@
 
 CPDF_Encryptor::~CPDF_Encryptor() {
   if (m_bNewBuf)
     FX_Free(m_pData);
 }
 
 }  // namespace
 
 CPDF_ObjectStream::CPDF_ObjectStream() : m_dwObjNum(0), m_index(0) {}
 
+CPDF_ObjectStream::~CPDF_ObjectStream() {}
+
 void CPDF_ObjectStream::Start() {
   m_Items.clear();
   m_Buffer.Clear();
   m_dwObjNum = 0;
   m_index = 0;
 }
 
 void CPDF_ObjectStream::CompressIndirectObject(uint32_t dwObjNum,
                                                const CPDF_Object* pObj) {
   m_Items.push_back({dwObjNum, m_Buffer.GetLength()});
@@ skipping 66 matching lines @@
   if (pFile->AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
     return -1;
   }
   offset += len + encryptor.m_dwSize;
   if ((len = pFile->AppendString("\r\nendstream\r\nendobj\r\n")) < 0) {
     return -1;
   }
   offset += len;
   return ObjOffset;
 }
+
 CPDF_XRefStream::CPDF_XRefStream()
     : m_PrevOffset(0), m_dwTempObjNum(0), m_iSeg(0) {}
+
+CPDF_XRefStream::~CPDF_XRefStream() {}
+
 FX_BOOL CPDF_XRefStream::Start() {
   m_IndexArray.clear();
   m_Buffer.Clear();
   m_iSeg = 0;
   return TRUE;
 }
 int32_t CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
                                                 const CPDF_Object* pObj,
                                                 CPDF_Creator* pCreator) {
   if (!pCreator)
@@ skipping 1392 matching lines @@
   m_pCryptoHandler = nullptr;
 }
 void CPDF_Creator::ResetStandardSecurity() {
   if (!m_bLocalCryptoHandler)
     return;
 
   delete m_pCryptoHandler;
   m_pCryptoHandler = nullptr;
   m_bLocalCryptoHandler = FALSE;
 }