Revert 69490 - base/version: remove wstring version...

base/version.h

 // Copyright (c) 2009 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_VERSION_H_
 #define BASE_VERSION_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 
-// Version represents a dotted version number, like "1.2.3.4", supporting
-// parsing and comparison.
-// Each component is limited to a uint16.
 class Version {
  public:
   // The version string must be made up of 1 or more uint16's separated
   // by '.'. Returns NULL if string is not in this format.
   // Caller is responsible for freeing the Version object once done.
+  static Version* GetVersionFromString(const std::wstring& version_str);
   static Version* GetVersionFromString(const std::string& version_str);
 
   // Exposed only so that a Version can be stored in STL containers;
   // any call to the methods below on a default-constructed Version
   // will DCHECK.
   Version();
 
   ~Version();
 
   bool Equals(const Version& other) const;
@@ skipping 11 matching lines @@
 
   bool is_valid_;
   std::vector<uint16> components_;
 
   FRIEND_TEST_ALL_PREFIXES(VersionTest, DefaultConstructor);
   FRIEND_TEST_ALL_PREFIXES(VersionTest, GetVersionFromString);
   FRIEND_TEST_ALL_PREFIXES(VersionTest, Compare);
 };
 
 #endif  // BASE_VERSION_H_