Removing useless Win7 checks + standardize its use

components/metrics/drive_metrics_provider_win.cc

 // Copyright 2015 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.
 
 #include "components/metrics/drive_metrics_provider.h"
 
 #include <windows.h>
 #include <winioctl.h>
 #include <vector>
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/strings/stringprintf.h"
-#include "base/win/windows_version.h"
 
 namespace metrics {
 
 // static
 bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
                                           bool* has_seek_penalty) {
-  if (base::win::GetVersion() < base::win::VERSION_WIN7) {
-    // TODO(dbeam): re-enable XP and Vista detection in a utility process.
-    return false;
-  }
-
   std::vector<base::FilePath::StringType> components;
   path.GetComponents(&components);
 
   base::File volume(base::FilePath(L"\\\\.\\" + components[0]),
                     base::File::FLAG_OPEN);
   if (!volume.IsValid())
     return false;
 
   STORAGE_PROPERTY_QUERY query = {};
   query.QueryType = PropertyStandardQuery;
   query.PropertyId = StorageDeviceSeekPenaltyProperty;
 
   DEVICE_SEEK_PENALTY_DESCRIPTOR result;
   DWORD bytes_returned;
 
   BOOL success = DeviceIoControl(
       volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &query,
       sizeof(query), &result, sizeof(result), &bytes_returned, NULL);
 
   if (success == FALSE || bytes_returned < sizeof(result))
     return false;
 
   *has_seek_penalty = result.IncursSeekPenalty != FALSE;
   return true;
 }
 
 }  // namespace metrics