base/version: remove wstring version

chrome/installer/util/install_util.cc

 // Copyright (c) 2010 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.
 //
 // See the corresponding header file for description of the functions in this
 // file.
 
 #include "chrome/installer/util/install_util.h"
 
 #include <shellapi.h>
@@ skipping 75 matching lines @@
 
   HKEY reg_root = (system_install) ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
   if (!key.Open(reg_root, dist->GetVersionKey().c_str(), KEY_READ) ||
       !key.ReadValue(google_update::kRegVersionField, &version_str)) {
     VLOG(1) << "No existing Chrome install found.";
     key.Close();
     return NULL;
   }
   key.Close();
   VLOG(1) << "Existing Chrome version found " << version_str;
-  return Version::GetVersionFromString(version_str);
+  return Version::GetVersionFromString(WideToASCII(version_str));
 }
 
 bool InstallUtil::IsOSSupported() {
   int major, minor;
   base::win::Version version = base::win::GetVersion();
   base::win::GetServicePackLevel(&major, &minor);
 
   // We do not support Win2K or older, or XP without service pack 2.
   VLOG(1) << "Windows Version: " << version
           << ", Service Pack: " << major << "." << minor;
@@ skipping 80 matching lines @@
                                       const std::wstring& value_name) {
   RegKey key(reg_root, key_path.c_str(), KEY_ALL_ACCESS);
   VLOG(1) << "Deleting registry value " << value_name;
   if (key.ValueExists(value_name.c_str()) &&
       !key.DeleteValue(value_name.c_str())) {
     LOG(ERROR) << "Failed to delete registry value: " << value_name;
     return false;
   }
   return true;
 }