Omnibox: Don't Let Users Escape Keyword Mode Accidentally

chrome/browser/autocomplete/search_provider.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.
 //
 // This file contains the Search autocomplete provider.  This provider is
 // responsible for all autocomplete entries that start with "Search <engine>
 // for ...", including searching for the current input string, search
 // history, and search suggestions.  An instance of it gets created and
 // managed by the autocomplete controller.
 
@@ skipping 410 matching lines @@
   // Returns an iterator to the first match in |matches_| which might
   // be chosen as default.  If
   // |autocomplete_result_will_reorder_for_default_match| is false,
   // this simply means the first match; otherwise, it means the first
   // match for which the |allowed_to_be_default_match| member is true.
   ACMatches::const_iterator FindTopMatch(
     bool autocomplete_result_will_reorder_for_default_match) const;
 
   // Checks if suggested relevances violate certain expected constraints.
   // See UpdateMatches() for the use and explanation of these constraints.
-  bool IsTopMatchNavigationInKeywordMode(
+  bool IsTopMatchNavigation(
       bool autocomplete_result_will_reorder_for_default_match) const;
+  bool HasKeywordMatchThatCanBeDefault() const;
   bool IsTopMatchScoreTooLow(
       bool autocomplete_result_will_reorder_for_default_match) const;
   bool IsTopMatchSearchWithURLInput(
       bool autocomplete_result_will_reorder_for_default_match) const;
   bool HasValidDefaultMatch(
       bool autocomplete_result_will_reorder_for_default_match) const;
 
   // Updates |matches_| from the latest results; applies calculated relevances
   // if suggested relevances cause undesriable behavior. Updates |done_|.
   void UpdateMatches();
@@ skipping 189 matching lines @@
   // If true, search history query suggestions will score low enough that
   // they will not be inlined.
   bool prevent_search_history_inlining_;
 
   GURL current_page_url_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_SEARCH_PROVIDER_H_