Removing useless Win7 checks + standardize its use

chrome/browser/download/download_status_updater_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/download/download_status_updater.h"
 
 #include <objbase.h>
 #include <shobjidl.h>
 #include <string>
 
 #include "base/logging.h"
 #include "base/win/scoped_comptr.h"
-#include "base/win/windows_version.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "ui/views/win/hwnd_util.h"
 
 namespace {
 
 void UpdateTaskbarProgressBar(int download_count,
                               bool progress_known,
                               float progress) {
-  // Taskbar progress bar is only supported on Win7.
-  if (base::win::GetVersion() < base::win::VERSION_WIN7)
-    return;
-
   base::win::ScopedComPtr<ITaskbarList3> taskbar;
   HRESULT result = ::CoCreateInstance(
       CLSID_TaskbarList, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&taskbar));
   if (FAILED(result)) {
     DVLOG(1) << "Failed creating a TaskbarList object: " << result;
     return;
   }
 
   result = taskbar->HrInit();
   if (FAILED(result)) {
@@ skipping 20 matching lines @@
 
 void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
     content::DownloadItem* download) {
 
   // Always update overall progress.
   float progress = 0;
   int download_count = 0;
   bool progress_known = GetProgress(&progress, &download_count);
   UpdateTaskbarProgressBar(download_count, progress_known, progress);
 }