Convert SHA256_LENGTH from a constant-in-anonymous-enum to a static const. This defines the cons...

crypto/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 "crypto/sha2.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "crypto/secure_hash.h"
 
 namespace crypto {
 
 void SHA256HashString(const std::string& str, void* output, size_t len) {
   scoped_ptr<SecureHash> ctx(SecureHash::Create(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);
+  std::string output(kSHA256Length, 0);
   SHA256HashString(str, string_as_array(&output), output.size());
   return output;
 }
 
 }  // namespace crypto