Prevent base::CheckedNumeric from leaking outside of pdfium.

core/src/fpdfdoc/doc_link.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 "../../include/fpdfdoc/fpdf_doc.h"
+#include "../../src/fxcrt/fx_safe_types.h"
+
 CPDF_LinkList::~CPDF_LinkList()
 {
     FX_POSITION pos = m_PageMap.GetStartPosition();
     while (pos) {
         FX_LPVOID key, value;
         m_PageMap.GetNextAssoc(pos, key, value);
         delete (CFX_PtrArray*)value;
     }
 }
 CFX_PtrArray* CPDF_LinkList::GetPageLinks(CPDF_Page* pPage)
@@ skipping 78 matching lines @@
         return name_tree.LookupNamedDest(pDoc, name);
     } else if (pDest->GetType() == PDFOBJ_ARRAY) {
         return (CPDF_Array*)pDest;
     }
     return NULL;
 }
 CPDF_Action CPDF_Link::GetAction()
 {
     return m_pDict->GetDict("A");
 }