Removing useless Win7 checks + standardize its use

chrome/browser/shell_integration_win.cc

 // Copyright (c) 2012 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 "chrome/browser/shell_integration_win.h"
 
 #include <windows.h>
 #include <objbase.h>
 #include <shlwapi.h>
 #include <shobjidl.h>
@@ skipping 728 matching lines @@
 }
 
 base::string16 GetChromiumModelIdForProfile(
     const base::FilePath& profile_path) {
   return GetAppModelIdForProfile(
       ShellUtil::GetBrowserModelId(InstallUtil::IsPerUserInstall()),
       profile_path);
 }
 
 void MigrateTaskbarPins() {
-  if (base::win::GetVersion() < base::win::VERSION_WIN7)
-    return;
-
   // This needs to happen (e.g. so that the appid is fixed and the
   // run-time Chrome icon is merged with the taskbar shortcut), but it is not an
   // urgent task.
   base::PostTaskWithTraits(FROM_HERE,
                            {base::MayBlock(), base::TaskPriority::BACKGROUND},
                            base::Bind(&MigrateTaskbarPinsCallback));
 }
 
 void GetIsPinnedToTaskbarState(
     const ConnectionErrorCallback& on_error_callback,
     const IsPinnedToTaskbarCallback& result_callback) {
   IsPinnedToTaskbarHelper::GetState(on_error_callback, result_callback);
 }
 
 int MigrateShortcutsInPathInternal(const base::FilePath& chrome_exe,
                                    const base::FilePath& path) {
-  DCHECK(base::win::GetVersion() >= base::win::VERSION_WIN7);
-
   // Enumerate all pinned shortcuts in the given path directly.
   base::FileEnumerator shortcuts_enum(
       path, false,  // not recursive
       base::FileEnumerator::FILES, FILE_PATH_LITERAL("*.lnk"));
 
   bool is_per_user_install = InstallUtil::IsPerUserInstall();
 
   int shortcuts_migrated = 0;
   base::FilePath target_path;
   base::string16 arguments;
@@ skipping 86 matching lines @@
             base::win::SHORTCUT_UPDATE_EXISTING)) {
       ++shortcuts_migrated;
     }
   }
   return shortcuts_migrated;
 }
 
 }  // namespace win
 
 }  // namespace shell_integration