Use auto keyword for iteration in jumplist

Change-Id: I6dbc74bfa3e1cd27b9893c1d55c3e9277dc08d32
Reviewed-on: https://chromium-review.googlesource.com/c/1261968Reviewed-by: Patrick Monette <pmonette@chromium.org>
Commit-Queue: Xi Cheng <chengx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#597162}

chrome/browser/win/jumplist.cc

@@ -862,8 +862,8 @@ int JumpList::CreateIconFiles(const base::FilePath& icon_dir,
   int icons_created = 0;
 
   // Reuse icons for urls that already present in the current JumpList.
-  for (ShellLinkItemList::const_iterator iter = item_list.begin();
-       iter != item_list.end() && max_items > 0; ++iter, --max_items) {
+  for (auto iter = item_list.begin(); iter != item_list.end() && max_items > 0;
+       ++iter, --max_items) {
     ShellLinkItem* item = iter->get();
     auto cache_iter = icon_cur.find(item->url());
     if (cache_iter != icon_cur.end()) {