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

base/sha2.cc

-// Copyright (c) 2011 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/crypto/secure_hash.h"
-#include "base/scoped_ptr.h"
-#include "base/stl_util-inl.h"
-
-namespace base {
-
-void SHA256HashString(const std::string& str, void* output, size_t len) {
-  scoped_ptr<base::SecureHash> ctx(base::SecureHash::Create(
-      base::SecureHash::SHA256));
-  ctx->Update(str.data(), str.length());
-  ctx->Finish(output, 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