Revert of Limit form-less Autofilling to pages that look like checkout pages.

components/autofill/core/common/autofill_regexes.h

-// Copyright 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.
-
-#ifndef COMPONENTS_AUTOFILL_CORE_COMMON_AUTOFILL_REGEXES_H_
-#define COMPONENTS_AUTOFILL_CORE_COMMON_AUTOFILL_REGEXES_H_
-
-#include "base/strings/string16.h"
-
-// Parsing utilities.
-namespace autofill {
-
-// Case-insensitive regular expression matching.
-// Returns true if |pattern| is found in |input|.
-bool MatchesPattern(const base::string16& input,
-                    const base::string16& pattern);
-
-}  // namespace autofill
-
-#endif  // COMPONENTS_AUTOFILL_CORE_COMMON_AUTOFILL_REGEXES_H_