Porting refactoring changes:...

base/sys_info.h

 // Copyright (c) 2008 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 "base/basictypes.h"
 
 #include <string>
@@ skipping 10 matching lines @@
 
   // Return the number of megabytes of physical memory on the current machine.
   static int AmountOfPhysicalMemoryMB() {
     return static_cast<int>(AmountOfPhysicalMemory() / 1024 / 1024);
   }
 
   // Return the available disk space in bytes on the volume containing |path|,
   // or -1 on failure.
   static int64 AmountOfFreeDiskSpace(const std::wstring& path);
 
+  // Return true if the given environment variable is defined.
+  // TODO: find a better place for HasEnvironmentVariable.
+  static bool HasEnvironmentVariable(const char* var);
+
+  // Return the value of the given environment variable
+  // or an empty string if not defined.
+  // TODO: find a better place for GetEnvironmentVariable.
+  static std::wstring GetEnvironmentVariable(const char* var);
+
+  // Returns the name of the host operating system.
+  static std::string OperatingSystemName();
+
+  // Returns the version of the host operating system.
+  static std::string OperatingSystemVersion();
+
+  // Returns the CPU architecture of the system. Exact return value may differ
+  // across platforms.
+  static std::string CPUArchitecture();
+
+  // Returns the pixel dimensions of the primary display via the
+  // width and height parameters.
+  static void GetPrimaryDisplayDimensions(int* width, int* height);
+
+  // Return the number of displays.
+  static int DisplayCount();
 };
 
 }  // namespace base
 
 #endif  // BASE_SYS_INFO_H_