Make payment manifest download/parse cross-platform

components/payments/content/android/utility/fingerprint_parser.cc

Index: components/payments/content/android/utility/fingerprint_parser.cc
diff --git a/components/payments/content/android/utility/fingerprint_parser.cc b/components/payments/content/android/utility/fingerprint_parser.cc
deleted file mode 100644
index 1dff204e622c1b44c90bf4380e9b3186d1e74173..0000000000000000000000000000000000000000
--- a/components/payments/content/android/utility/fingerprint_parser.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2017 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.
-
-#include "components/payments/content/android/utility/fingerprint_parser.h"
-
-#include "base/logging.h"
-#include "base/numerics/safe_conversions.h"
-
-namespace payments {
-namespace {
-
-bool IsUpperCaseHexDigit(char c) {
-  return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F');
-}
-
-uint8_t HexDigitToByte(char c) {
-  DCHECK(IsUpperCaseHexDigit(c));
-  return base::checked_cast<uint8_t>(c >= '0' && c <= '9' ? c - '0'
-                                                          : c - 'A' + 10);
-}
-
-}  // namespace
-
-std::vector<uint8_t> FingerprintStringToByteArray(const std::string& input) {
-  std::vector<uint8_t> output;
-  if (input.size() != 32 * 3 - 1)
-    return output;
-
-  for (size_t i = 0; i < input.size(); i += 3) {
-    if (i < input.size() - 2 && input[i + 2] != ':') {
-      output.clear();
-      return output;
-    }
-
-    char big_end = input[i];
-    char little_end = input[i + 1];
-    if (!IsUpperCaseHexDigit(big_end) || !IsUpperCaseHexDigit(little_end)) {
-      output.clear();
-      return output;
-    }
-
-    output.push_back(HexDigitToByte(big_end) * static_cast<uint8_t>(16) +
-                     HexDigitToByte(little_end));
-  }
-
-  return output;
-}
-
-}  // namespace payments