Replace more for loops in GN

tools/gn/function_get_path_info.cc

 // Copyright 2014 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 "tools/gn/err.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/value.h"
@@ skipping 204 matching lines @@
     return Value();
   }
 
   const SourceDir& current_dir = scope->GetSourceDir();
   if (args[0].type() == Value::STRING) {
     return Value(function, GetOnePathInfo(scope->settings(), current_dir, what,
                                           args[0], err));
   } else if (args[0].type() == Value::LIST) {
     const std::vector<Value>& input_list = args[0].list_value();
     Value result(function, Value::LIST);
-    for (size_t i = 0; i < input_list.size(); i++) {
+    for (const auto& cur : input_list) {
       result.list_value().push_back(Value(function,
-          GetOnePathInfo(scope->settings(), current_dir, what,
-                         input_list[i], err)));
+          GetOnePathInfo(scope->settings(), current_dir, what, cur, err)));
       if (err->has_error())
         return Value();
     }
     return result;
   }
 
   *err = Err(args[0], "Path must be a string or a list of strings.");
   return Value();
 }
 
 }  // namespace functions