Move crypto files out of base, to a top level directory.

base/sha2.cc

-// Copyright (c) 2006-2008 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 "base/sha2.h"
-
-#include "base/stl_util-inl.h"
-#include "base/third_party/nss/blapi.h"
-#include "base/third_party/nss/sha256.h"
-
-namespace base {
-
-void SHA256HashString(const std::string& str, void* output, size_t len) {
-  SHA256Context ctx;
-
-  SHA256_Begin(&ctx);
-  SHA256_Update(&ctx, reinterpret_cast<const unsigned char*>(str.data()),
-                static_cast<unsigned int>(str.length()));
-  SHA256_End(&ctx, static_cast<unsigned char*>(output), NULL,
-             static_cast<unsigned int>(len));
-}
-
-std::string SHA256HashString(const std::string& str) {
-  std::string output(SHA256_LENGTH, 0);
-  SHA256HashString(str, string_as_array(&output), output.size());
-  return output;
-}
-
-}  // namespace base