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diff --git a/components/url_matcher/url_matcher_factory.h b/components/url_matcher/url_matcher_factory.h
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+// 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_URL_MATCHER_URL_MATCHER_FACTORY_H_
+#define COMPONENTS_URL_MATCHER_URL_MATCHER_FACTORY_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "components/url_matcher/url_matcher.h"
+#include "components/url_matcher/url_matcher_export.h"
+
+namespace base {
+class DictionaryValue;
+class Value;
+}
+
+namespace url_matcher {
+
+class URL_MATCHER_EXPORT URLMatcherFactory {
+ public:
+  // Creates a URLMatcherConditionSet from a UrlFilter dictionary as defined in
+  // the declarative API. |url_fetcher_dict| contains the dictionary passed
+  // by the extension, |id| is the identifier assigned to the created
+  // URLMatcherConditionSet. In case of an error, |error| is set to contain
+  // an error message.
+  //
+  // Note: In case this function fails or if you don't register the
+  // URLMatcherConditionSet to the URLMatcher, you need to call
+  // URLMatcher::ClearUnusedConditionSets() on the URLMatcher that owns this
+  // URLMatcherFactory. Otherwise you leak memory.
+  static scoped_refptr<URLMatcherConditionSet> CreateFromURLFilterDictionary(
+      URLMatcherConditionFactory* url_matcher_condition_factory,
+      const base::DictionaryValue* url_filter_dict,
+      URLMatcherConditionSet::ID id,
+      std::string* error);
+
+ private:
+  // Returns whether a condition attribute with name |condition_attribute_name|
+  // needs to be handled by the URLMatcher.
+  static bool IsURLMatcherConditionAttribute(
+      const std::string& condition_attribute_name);
+
+  // Factory method of for URLMatcherConditions.
+  static URLMatcherCondition CreateURLMatcherCondition(
+      URLMatcherConditionFactory* url_matcher_condition_factory,
+      const std::string& condition_attribute_name,
+      const base::Value* value,
+      std::string* error);
+
+  static scoped_ptr<URLMatcherSchemeFilter> CreateURLMatcherScheme(
+      const base::Value* value, std::string* error);
+
+  static scoped_ptr<URLMatcherPortFilter> CreateURLMatcherPorts(
+      const base::Value* value, std::string* error);
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(URLMatcherFactory);
+};
+
+}  // namespace url_matcher
+
+#endif  // COMPONENTS_URL_MATCHER_URL_MATCHER_FACTORY_H_