Modify big integer library

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 pdf_use_skia = false
 
 config("pdfium_config") {
   cflags = []
   defines = [
     "FOXIT_CHROME_BUILD",
@@ skipping 72 matching lines @@
     "fpdfsdk/include/fpdf_transformpage.h",
     "fpdfsdk/src/fpdf_transformpage.cpp",
   ]
 
   libs = []
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ ":pdfium_config", "//build/config/compiler:no_chromium_code" ]
 
   deps = [
     ":safemath",
+    ":bigint",
     ":fdrm",
     ":formfiller",
     ":fpdfapi",
     ":fpdfdoc",
     ":fpdftext",
     ":fxcodec",
     ":fxcrt",
     ":fxedit",
     ":fxge",
     ":javascript",
@@ skipping 18 matching lines @@
     "third_party/logging.h",
     "third_party/macros.h",
     "third_party/template_util.h",
     "third_party/numerics/safe_conversions.h",
     "third_party/numerics/safe_conversions_impl.h",
     "third_party/numerics/safe_math.h",
     "third_party/numerics/safe_math_impl.h",
   ]
 }
 
+static_library("bigint") {
+  sources = [
+    "third_party/bigint/BigInteger.hh",
+    "third_party/bigint/BigIntegerLibrary.hh",
+    "third_party/bigint/BigIntegerUtils.hh",
+    "third_party/bigint/BigUnsigned.hh",
+    "third_party/bigint/NumberlikeArray.hh",
+    "third_party/bigint/BigUnsignedInABase.hh",
+    "third_party/bigint/BigInteger.cc",
+    "third_party/bigint/BigIntegerUtils.cc",
+    "third_party/bigint/BigUnsigned.cc",
+    "third_party/bigint/BigUnsignedInABase.cc",
+  ]
+}
+
 static_library("fdrm") {
   sources = [
     "core/include/fdrm/fx_crypt.h",
     "core/src/fdrm/crypto/fx_crypt.cpp",
     "core/src/fdrm/crypto/fx_crypt_aes.cpp",
     "core/src/fdrm/crypto/fx_crypt_sha.cpp",
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ ":pdfium_config", "//build/config/compiler:no_chromium_code" ]
 }
@@ skipping 681 matching lines @@
     "fpdfsdk/src/formfiller/FFL_ListBox.cpp",
     "fpdfsdk/src/formfiller/FFL_Notify.cpp",
     "fpdfsdk/src/formfiller/FFL_PushButton.cpp",
     "fpdfsdk/src/formfiller/FFL_RadioButton.cpp",
     "fpdfsdk/src/formfiller/FFL_TextField.cpp",
     "fpdfsdk/src/formfiller/FFL_Utils.cpp",
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ ":pdfium_config", "//build/config/compiler:no_chromium_code" ]
 }