Move c/c/extensions/matcher/ to top level extension dir

chrome/common/extensions/matcher/url_matcher_helpers.h

-// Copyright (c) 2012 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.
-
-// Helper functions used for URLMatcher and Declarative APIs.
-
-#ifndef CHROME_COMMON_EXTENSIONS_MATCHER_URL_MATCHER_HELPERS_H_
-#define CHROME_COMMON_EXTENSIONS_MATCHER_URL_MATCHER_HELPERS_H_
-
-#include <string>
-#include <vector>
-
-namespace base {
-class Value;
-}
-
-namespace extensions {
-namespace url_matcher_helpers {
-
-// Converts a ValueList |value| of strings into a vector. Returns true if
-// successful.
-bool GetAsStringVector(const base::Value* value, std::vector<std::string>* out);
-
-}  // namespace declarative_helpers
-}  // namespace extensions
-
-#endif  // CHROME_COMMON_EXTENSIONS_MATCHER_URL_MATCHER_HELPERS_H_