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diff --git a/chrome/browser/search_versus_navigate_classifier.h b/chrome/browser/search_versus_navigate_classifier.h
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+++ b/chrome/browser/search_versus_navigate_classifier.h
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+// Copyright (c) 2009 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 CHROME_BROWSER_SEARCH_VERSUS_NAVIGATE_CLASSIFIER_H_
+#define CHROME_BROWSER_SEARCH_VERSUS_NAVIGATE_CLASSIFIER_H_
+
+#include <string>
+
+#include "base/scoped_ptr.h"
+#include "chrome/common/page_transition_types.h"
+
+class AutocompleteController;
+class GURL;
+class Profile;
+
+class SearchVersusNavigateClassifier {
+ public:
+  explicit SearchVersusNavigateClassifier(Profile* profile);
+  virtual ~SearchVersusNavigateClassifier();
+
+  // Given some string |text| that the user wants to use for navigation,
+  // determines whether to treat it as a search query or a URL, and returns the
+  // details of the resulting navigation.
+  // NOTE: After |desired_tld|, all parameters are potentially-NULL outparams.
+  // |desired_tld|        - User's desired TLD.
+  //                        See AutocompleteInput::desired_tld().
+  // |is_search|          - Set to true if this is to be treated as a
+  //                        query rather than URL.
+  // |destination_url|    - The URL to load. It may be empty if there is no
+  //                        possible navigation (when |text| is empty).
+  // |transition|         - The transition type.
+  // |is_history_what_you_typed_match|
+  //                      - Set to true when the default match is the
+  //                        "what you typed" match from the history.
+  // |alternate_nav_url|  - The navigational URL in case of an accidental
+  //                        search; see comments on
+  //                        AutocompleteResult::alternate_nav_url_ in
+  //                        autocomplete.h.
+  void Classify(const std::wstring& text,
+                const std::wstring& desired_tld,
+                bool* is_search,
+                GURL* destination_url,
+                PageTransition::Type* transition,
+                bool* is_history_what_you_typed_match,
+                GURL* alternate_nav_url);
+
+ private:
+  scoped_ptr<AutocompleteController> controller_;
+};
+
+#endif  // CHROME_BROWSER_SEARCH_VERSUS_NAVIGATE_CLASSIFIER_H_