Removing useless Win7 checks + standardize its use

chrome/browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc

Index: chrome/browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc
diff --git a/chrome/browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc b/chrome/browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc
index eef4638710b613649a18b4f1aa9cb38d5ea3daee..80e5953f533d111215e43b8ed0db2ab64f5d2c70 100644
--- a/chrome/browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc
+++ b/chrome/browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc
@@ -40,8 +40,8 @@ class SetAsDefaultBrowserUIBrowserTestWithFirstRun
 
 IN_PROC_BROWSER_TEST_F(SetAsDefaultBrowserUIBrowserTestWithFirstRun, Test) {
   // Windows 8 only test case.
-  if (base::win::GetVersion() <= base::win::VERSION_WIN7 ||
-      base::win::GetVersion() >= base::win::VERSION_WIN10) {
+  if (base::win::GetVersion() != base::win::VERSION_WIN8 &&
+      base::win::GetVersion() != base::win::VERSION_WIN8_1) {
     return;
   }
   ASSERT_FALSE(IsBrowserVisible(browser()));