Removing useless Win7 checks + standardize its use

chrome/browser/ui/prefs/prefs_tab_helper.cc

Index: chrome/browser/ui/prefs/prefs_tab_helper.cc
diff --git a/chrome/browser/ui/prefs/prefs_tab_helper.cc b/chrome/browser/ui/prefs/prefs_tab_helper.cc
index 175e4db36ae2b7cc87a0243c748793cacff4813f..7e3ed58587187be7efd49fb68e654eb1b2dda88d 100644
--- a/chrome/browser/ui/prefs/prefs_tab_helper.cc
+++ b/chrome/browser/ui/prefs/prefs_tab_helper.cc
@@ -59,10 +59,6 @@
 #include "chrome/browser/themes/theme_service_factory.h"
 #endif
 
-#if defined(OS_WIN)
-#include "base/win/windows_version.h"
-#endif
-
 using content::WebContents;
 using content::WebPreferences;
 
@@ -167,8 +163,7 @@ bool ShouldUseAlternateDefaultFixedFont(const std::string& script) {
     return false;
   UINT smooth_type = 0;
   SystemParametersInfo(SPI_GETFONTSMOOTHINGTYPE, 0, &smooth_type, 0);
-  return (base::win::GetVersion() >= base::win::VERSION_WIN7) &&
-         (smooth_type == FE_FONTSMOOTHINGCLEARTYPE);
+  return smooth_type == FE_FONTSMOOTHINGCLEARTYPE;
 }
 #endif