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diff --git a/base/ios/device_util.h b/base/ios/device_util.h
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+// 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 {
+namespace device_util {
+
+// Returns the hardware version of the device the app is running on.
+//
+// The returned string is the string returned by sysctlbyname() with name
+// "hw.machine". Possible (known) values include:
+//
+// iPhone1,1 -> iPhone 1G
+// iPhone1,2 -> iPhone 3G
+// iPhone2,1 -> iPhone 3GS
+// iPhone3,1 -> iPhone 4/AT&T
+// iPhone3,2 -> iPhone 4/Other Carrier?
+// iPhone3,3 -> iPhone 4/Other Carrier?
+// iPhone4,1 -> iPhone 4S
+//
+// iPod1,1   -> iPod touch 1G
+// iPod2,1   -> iPod touch 2G
+// iPod2,2   -> ?
+// iPod3,1   -> iPod touch 3G
+// iPod4,1   -> iPod touch 4G
+// iPod5,1   -> ?
+//
+// iPad1,1   -> iPad 1G, WiFi
+// iPad1,?   -> iPad 1G, 3G <- needs 3G owner to test
+// iPad2,1   -> iPad 2G, WiFi
+//
+// AppleTV2,1 -> AppleTV 2
+//
+// i386       -> Simulator
+// x86_64     -> Simulator
+std::string GetPlatform();
+
+// Returns true if the application is running on a high-ram device. (>=250M).
+bool IsRunningOnHighRamDevice();
+
+// Returns true if the device has only one core.
+bool IsSingleCoreDevice();
+
+// Returns the MAC address of the interface with name |interface_name|.
+std::string GetMacAddress(const std::string& interface_name);
+
+// 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);
+
+}  // namespace device_util
+}  // namespace ios
+
+#endif  // BASE_IOS_DEVICE_UTIL_H_