Merge to XFA: Make (and verify) public/ files compile under C.

public/fpdf_dataavail.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_DATAAVAIL_H_
 #define _FPDF_DATAAVAIL_H_
 
 #include <stddef.h>  // For size_t.
@@ skipping 29 matching lines @@
          *              Yes
          * Parameters:
          *              pThis           -       Pointer to the interface structure itself.
          *              offset          -       The offset of the data section in the file.
          *              size            -       The size of the data section
          * Return Value:
          *              true means the specified data section is available.
          * Comments:
          *              Called by Foxit SDK to check whether the data section is ready.
          */
-        bool (*IsDataAvail)(struct _FX_FILEAVAIL* pThis, size_t offset, size_t size);
+        FPDF_BOOL (*IsDataAvail)(struct _FX_FILEAVAIL* pThis, size_t offset, size_t size);
 } FX_FILEAVAIL;
 
 typedef void* FPDF_AVAIL;
 
 /**
 * Function: FPDFAvail_Create
 *                       Create a document availability provider.
 *
 * Parameters: 
 *                       file_avail      -       Pointer to file availability interface to check availability of file data.
@@ skipping 153 matching lines @@
 *
 */
 DLLEXPORT FPDF_BOOL STDCALL FPDFAvail_IsLinearized(FPDF_AVAIL avail);
 
 #ifdef __cplusplus
 };
 #endif
 
 #endif