Change bool type to fix warnings.

fpdfsdk/include/fsdk_mgr.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 FPDFSDK_INCLUDE_FSDK_MGR_H_
 #define FPDFSDK_INCLUDE_FSDK_MGR_H_
 
 #include <map>
@@ skipping 97 matching lines @@
   }
 
   FX_BOOL FFI_IsCTRLKeyDown(uint32_t nFlag) const {
     return (nFlag & FWL_EVENTFLAG_ControlKey) != 0;
   }
 
   FX_BOOL FFI_IsALTKeyDown(uint32_t nFlag) const {
     return (nFlag & FWL_EVENTFLAG_AltKey) != 0;
   }
 
-  FX_BOOL FFI_IsINSERTKeyDown(uint32_t nFlag) const { return FALSE; }
-
   FPDF_PAGE FFI_GetPage(FPDF_DOCUMENT document, int nPageIndex) {
     if (m_pInfo && m_pInfo->FFI_GetPage)
       return m_pInfo->FFI_GetPage(m_pInfo, document, nPageIndex);
     return NULL;
   }
 
   FPDF_PAGE FFI_GetCurrentPage(FPDF_DOCUMENT document) {
     if (m_pInfo && m_pInfo->FFI_GetCurrentPage)
       return m_pInfo->FFI_GetCurrentPage(m_pInfo, document);
     return NULL;
@@ skipping 510 matching lines @@
   FX_BOOL m_bTakeOverPage;
 #endif  // PDF_ENABLE_XFA
   FX_BOOL m_bEnterWidget;
   FX_BOOL m_bExitWidget;
   FX_BOOL m_bOnWidget;
   FX_BOOL m_bValid;
   FX_BOOL m_bLocked;
 };
 
 #endif  // FPDFSDK_INCLUDE_FSDK_MGR_H_