Update legacy Tuple-using code.

ui/shell_dialogs/select_file_dialog_win.cc

Index: ui/shell_dialogs/select_file_dialog_win.cc
diff --git a/ui/shell_dialogs/select_file_dialog_win.cc b/ui/shell_dialogs/select_file_dialog_win.cc
index 6e1a8abf9ac9f831e2f83f3bc62e1fa825a42c42..b963b06f3a99eba7e9691644d574540ca08bc5cd 100644
--- a/ui/shell_dialogs/select_file_dialog_win.cc
+++ b/ui/shell_dialogs/select_file_dialog_win.cc
@@ -516,12 +516,12 @@ bool SelectFileDialogImpl::SaveFileAsWithFilter(
   // Figure out what filter got selected. The filter index is 1-based.
   std::wstring filter_selected;
   if (*index > 0) {
-    std::vector<Tuple2<base::string16, base::string16> > filters =
+    std::vector<Tuple<base::string16, base::string16>> filters =
         ui::win::OpenFileName::GetFilters(save_as.GetOPENFILENAME());
     if (*index > filters.size())
       NOTREACHED() << "Invalid filter index.";
     else
-      filter_selected = filters[*index - 1].b;
+      filter_selected = get<1>(filters[*index - 1]);
   }
 
   // Get the extension that was suggested to the user (when the Save As dialog