XFA: Add missing libtiff file from commit 9c2c87d1c744.

third_party/BUILD.gn

 # 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.
 
 import("../pdfium.gni")
 
 group("third_party") {
   deps = [
     ":bigint",
     ":fx_freetype",
@@ skipping 288 matching lines @@
 
 if (pdf_enable_xfa) {
   source_set("fx_tiff") {
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [
       "//build/config/compiler:no_chromium_code",
       "//third_party/pdfium:pdfium_config",
     ]
     sources = [
       "libtiff/tiffiop.h",
+      "libtiff/tiffvers.h",
       "libtiff/tif_aux.c",
       "libtiff/tif_close.c",
       "libtiff/tif_codec.c",
       "libtiff/tif_color.c",
       "libtiff/tif_compress.c",
       "libtiff/tif_dir.c",
       "libtiff/tif_dirinfo.c",
       "libtiff/tif_dirread.c",
       "libtiff/tif_dirwrite.c",
       "libtiff/tif_dumpmode.c",
@@ skipping 60 matching lines @@
   sources = [
     "base/logging.h",
     "base/macros.h",
     "base/numerics/safe_conversions.h",
     "base/numerics/safe_conversions_impl.h",
     "base/numerics/safe_math.h",
     "base/numerics/safe_math_impl.h",
     "base/stl_util.h",
   ]
 }