Replace more for loops in GN

tools/gn/function_exec_script.cc

 // Copyright (c) 2013 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 "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/process/kill.h"
 #include "base/process/launch.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 307 matching lines @@
   trace.SetToolchain(settings->toolchain_label());
 
   // Add all dependencies of this script, including the script itself, to the
   // build deps.
   g_scheduler->AddGenDependency(script_path);
   if (args.size() == 4) {
     const Value& deps_value = args[3];
     if (!deps_value.VerifyTypeIs(Value::LIST, err))
       return Value();
 
-    for (size_t i = 0; i < deps_value.list_value().size(); i++) {
-      if (!deps_value.list_value()[0].VerifyTypeIs(Value::STRING, err))
+    for (const auto& dep : deps_value.list_value()) {
+      if (!dep.VerifyTypeIs(Value::STRING, err))
         return Value();
       g_scheduler->AddGenDependency(
           build_settings->GetFullPath(cur_dir.ResolveRelativeFile(
-              deps_value.list_value()[0].string_value())));
+              dep.string_value())));
     }
   }
 
   // Make the command line.
   const base::FilePath& python_path = build_settings->python_path();
   CommandLine cmdline(python_path);
   cmdline.AppendArgPath(script_path);
 
   if (args.size() >= 2) {
     // Optional command-line arguments to the script.
     const Value& script_args = args[1];
     if (!script_args.VerifyTypeIs(Value::LIST, err))
       return Value();
-    for (size_t i = 0; i < script_args.list_value().size(); i++) {
-      if (!script_args.list_value()[i].VerifyTypeIs(Value::STRING, err))
+    for (const auto& arg : script_args.list_value()) {
+      if (!arg.VerifyTypeIs(Value::STRING, err))
         return Value();
-      cmdline.AppendArg(script_args.list_value()[i].string_value());
+      cmdline.AppendArg(arg.string_value());
     }
   }
 
   // Log command line for debugging help.
   trace.SetCommandLine(cmdline);
   base::TimeTicks begin_exec;
   if (g_scheduler->verbose_logging()) {
 #if defined(OS_WIN)
     g_scheduler->Log("Pythoning",
                      base::UTF16ToUTF8(cmdline.GetCommandLineString()));
@@ skipping 47 matching lines @@
                msg);
     return Value();
   }
 
   // Default to None value for the input conversion if unspecified.
   return ConvertInputToValue(scope->settings(), output, function,
                              args.size() >= 3 ? args[2] : Value(), err);
 }
 
 }  // namespace functions