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

chrome/common/extensions/matcher/url_matcher_helpers.cc

-// 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.
-
-#include "chrome/common/extensions/matcher/url_matcher_helpers.h"
-
-#include "base/values.h"
-
-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) {
-  const ListValue* value_as_list = 0;
-  if (!value->GetAsList(&value_as_list))
-    return false;
-
-  size_t number_types = value_as_list->GetSize();
-  for (size_t i = 0; i < number_types; ++i) {
-    std::string item;
-    if (!value_as_list->GetString(i, &item))
-      return false;
-    out->push_back(item);
-  }
-  return true;
-}
-
-}  // namespace url_matcher_helpers
-}  // namespace extensions