Removing useless Win7 checks + standardize its use

components/metrics/drive_metrics_provider_win.cc

Index: components/metrics/drive_metrics_provider_win.cc
diff --git a/components/metrics/drive_metrics_provider_win.cc b/components/metrics/drive_metrics_provider_win.cc
index 360b80e690a55c3e22aea6bb21a811a781b969d4..04647a9d41bb5a16754bd60cd6f1f0900980bf61 100644
--- a/components/metrics/drive_metrics_provider_win.cc
+++ b/components/metrics/drive_metrics_provider_win.cc
@@ -11,18 +11,12 @@
 #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);