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

components/autofill/core/browser/autofill_regexes.h

Index: components/autofill/core/browser/autofill_regexes.h
diff --git a/components/autofill/core/browser/autofill_regexes.h b/components/autofill/core/browser/autofill_regexes.h
new file mode 100644
index 0000000000000000000000000000000000000000..f4b57759e03ef2fb8240038db8d56b24e834b53f
--- /dev/null
+++ b/components/autofill/core/browser/autofill_regexes.h
@@ -0,0 +1,20 @@
+// 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_BROWSER_AUTOFILL_REGEXES_H_
+#define COMPONENTS_AUTOFILL_CORE_BROWSER_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_BROWSER_AUTOFILL_REGEXES_H_