Refactors GetDeviceIdentifier()

base/ios/device_util.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_IOS_DEVICE_UTIL_H_
 #define BASE_IOS_DEVICE_UTIL_H_
 
 #include <string>
 
 namespace ios {
@@ skipping 54 matching lines @@
 // Returns a random UUID.
 std::string GetRandomId();
 
 // Returns an identifier for the device, using the given |salt|. A global
 // identifier is generated the first time this method is called, and the salt
 // is used to be able to generate distinct identifiers for the same device. If
 // |salt| is NULL, a default value is used. Unless you are using this value for
 // something that should be anonymous, you should probably pass NULL.
 std::string GetDeviceIdentifier(const char* salt);
 
+// Returns a hashed version of |in_string| using |salt| (which must not
+// zero-length). Different salt values should result in differently hashed
+// strings.
+std::string GetSaltedString(const std::string& in_string,
+                            const std::string& salt);
+
 }  // namespace device_util
 }  // namespace ios
 
 #endif  // BASE_IOS_DEVICE_UTIL_H_