Adding utility method to test the version of the OS.

base/sys_info.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_SYS_INFO_H_
 #define BASE_SYS_INFO_H_
 
 #include <string>
 
 #include "base/base_export.h"
@@ skipping 82 matching lines @@
   static std::string GetAndroidBuildCodename();
 
   // Returns the Android build ID.
   static std::string GetAndroidBuildID();
 
   // Returns the device's name.
   static std::string GetDeviceName();
 
   static int DalvikHeapSizeMB();
 #endif  // defined(OS_ANDROID)
+
+#if defined(OS_IOS)
+  // Running on iOS 5 or later?
+  static bool IsRunningOnIOS5OrLater();
+
+  // Running on iOS 6 or later?
+  static bool IsRunningOnIOS6OrLater();
+
+  // Running on a specific iOS version or later.
+  static bool IsRunningOnOrLater(int major, int minor, int bugFix);
+#endif  // defined(OS_IOS)
 };
 
 }  // namespace base
 
 #endif  // BASE_SYS_INFO_H_