Create top-level public/ header directory.

fpdfsdk/include/fpdf_flatten.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 _FPDF_FLATTEN_H_
-#define _FPDF_FLATTEN_H_
-        
-#include "fpdfview.h"
-
-#define FLATTEN_FAIL                    0       // Flatten operation failed.
-#define FLATTEN_SUCCESS                 1       // Flatten operation succeed.
-#define FLATTEN_NOTINGTODO              2       // There is nothing can be flatten.
-        
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define FLAT_NORMALDISPLAY     0
-#define FLAT_PRINT             1    
-        //Function: FPDFPage_Flatten
-
-        //                      Flat a pdf page,annotations or form fields will become part of the page contents.
-        //Parameters:
-
-        //                      page  - Handle to the page. Returned by FPDF_LoadPage function.
-        //                      nFlag - the flag for the use of flatten result. Zero for normal display, 1 for print.
-        //Return value:
-        //                      The result flag of the function, See flags above ( FLATTEN_FAIL, FLATTEN_SUCCESS, FLATTEN_NOTINGTODO ).
-        //
-        // Comments: Current version all fails return zero. If necessary we will assign different value
-        //                      to indicate different fail reason.
-        // 
-        DLLEXPORT int STDCALL FPDFPage_Flatten( FPDF_PAGE page, int nFlag);
-                
-                
-#ifdef __cplusplus
-};
-#endif
-
-#endif //_FPDF_FLATTEN_H_