Cleanup: Use base/files/file_util.h instead of base/file_util.h in [r-t]*/

tools/gn/function_write_file_unittest.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 "base/file_util.h"
 #include "base/files/file.h"
+#include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/test_with_scope.h"
 
 namespace {
 
 // Returns true on success, false if write_file signaled an error.
 bool CallWriteFile(Scope* scope,
                    const std::string& filename,
@@ skipping 60 matching lines @@
   base::File::Info original_info;
   foo_file.GetInfo(&original_info);
 
   EXPECT_TRUE(CallWriteFile(setup.scope(), "//out/foo.txt", some_list));
 
   // Verify that the last modified time is the same as before.
   base::File::Info new_info;
   foo_file.GetInfo(&new_info);
   EXPECT_EQ(original_info.last_modified, new_info.last_modified);
 }