diff -r 000000000000 -r 6474c204b198 security/sandbox/chromium/base/win/windows_version.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/chromium/base/win/windows_version.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,111 @@
+// 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_WIN_WINDOWS_VERSION_H_
+#define BASE_WIN_WINDOWS_VERSION_H_
+
+#include <string>
+
+#include "base/base_export.h"
+#include "base/basictypes.h"
+
+typedef void* HANDLE;
+
+namespace base {
+namespace win {
+
+// The running version of Windows.  This is declared outside OSInfo for
+// syntactic sugar reasons; see the declaration of GetVersion() below.
+// NOTE: Keep these in order so callers can do things like
+// "if (base::win::GetVersion() >= base::win::VERSION_VISTA) ...".
+enum Version {
+  VERSION_PRE_XP = 0,  // Not supported.
+  VERSION_XP,
+  VERSION_SERVER_2003, // Also includes XP Pro x64 and Server 2003 R2.
+  VERSION_VISTA,       // Also includes Windows Server 2008.
+  VERSION_WIN7,        // Also includes Windows Server 2008 R2.
+  VERSION_WIN8,        // Also includes Windows Server 2012.
+  VERSION_WIN8_1,      // Code named Windows Blue
+  VERSION_WIN_LAST,    // Indicates error condition.
+};
+
+// A singleton that can be used to query various pieces of information about the
+// OS and process state. Note that this doesn't use the base Singleton class, so
+// it can be used without an AtExitManager.
+class BASE_EXPORT OSInfo {
+ public:
+  struct VersionNumber {
+    int major;
+    int minor;
+    int build;
+  };
+
+  struct ServicePack {
+    int major;
+    int minor;
+  };
+
+  // The processor architecture this copy of Windows natively uses.  For
+  // example, given an x64-capable processor, we have three possibilities:
+  //   32-bit Chrome running on 32-bit Windows:           X86_ARCHITECTURE
+  //   32-bit Chrome running on 64-bit Windows via WOW64: X64_ARCHITECTURE
+  //   64-bit Chrome running on 64-bit Windows:           X64_ARCHITECTURE
+  enum WindowsArchitecture {
+    X86_ARCHITECTURE,
+    X64_ARCHITECTURE,
+    IA64_ARCHITECTURE,
+    OTHER_ARCHITECTURE,
+  };
+
+  // Whether a process is running under WOW64 (the wrapper that allows 32-bit
+  // processes to run on 64-bit versions of Windows).  This will return
+  // WOW64_DISABLED for both "32-bit Chrome on 32-bit Windows" and "64-bit
+  // Chrome on 64-bit Windows".  WOW64_UNKNOWN means "an error occurred", e.g.
+  // the process does not have sufficient access rights to determine this.
+  enum WOW64Status {
+    WOW64_DISABLED,
+    WOW64_ENABLED,
+    WOW64_UNKNOWN,
+  };
+
+  static OSInfo* GetInstance();
+
+  Version version() const { return version_; }
+  // The next two functions return arrays of values, [major, minor(, build)].
+  VersionNumber version_number() const { return version_number_; }
+  ServicePack service_pack() const { return service_pack_; }
+  WindowsArchitecture architecture() const { return architecture_; }
+  int processors() const { return processors_; }
+  size_t allocation_granularity() const { return allocation_granularity_; }
+  WOW64Status wow64_status() const { return wow64_status_; }
+  std::string processor_model_name();
+
+  // Like wow64_status(), but for the supplied handle instead of the current
+  // process.  This doesn't touch member state, so you can bypass the singleton.
+  static WOW64Status GetWOW64StatusForProcess(HANDLE process_handle);
+
+ private:
+  OSInfo();
+  ~OSInfo();
+
+  Version version_;
+  VersionNumber version_number_;
+  ServicePack service_pack_;
+  WindowsArchitecture architecture_;
+  int processors_;
+  size_t allocation_granularity_;
+  WOW64Status wow64_status_;
+  std::string processor_model_name_;
+
+  DISALLOW_COPY_AND_ASSIGN(OSInfo);
+};
+
+// Because this is by far the most commonly-requested value from the above
+// singleton, we add a global-scope accessor here as syntactic sugar.
+BASE_EXPORT Version GetVersion();
+
+}  // namespace win
+}  // namespace base
+
+#endif  // BASE_WIN_WINDOWS_VERSION_H_