Move crypto_helpers from sync to base

chrome/browser/sync/util/user_settings.cc

Index: chrome/browser/sync/util/user_settings.cc
diff --git a/chrome/browser/sync/util/user_settings.cc b/chrome/browser/sync/util/user_settings.cc
index d49a071050f9806c18863b9cee38a64552479c92..ae544efee290b4556ee1be4fb88e5a0a8fa8451f 100644
--- a/chrome/browser/sync/util/user_settings.cc
+++ b/chrome/browser/sync/util/user_settings.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 //
@@ -20,9 +20,10 @@
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "chrome/browser/sync/syncable/directory_manager.h"  // For migration.
-#include "chrome/browser/sync/util/crypto_helpers.h"
 #include "chrome/browser/sync/util/data_encryption.h"
 #include "chrome/common/sqlite_utils.h"
+#include "crypto/md5_calculator.h"
+#include "crypto/random.h"
 
 using std::numeric_limits;
 using std::string;