Removes the link in the omnibox for searching history.

chrome/browser/autocomplete/autocomplete_match.h

 // Copyright (c) 2010 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_AUTOCOMPLETE_AUTOCOMPLETE_MATCH_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_MATCH_H_
 #pragma once
 
 #include <vector>
 #include <string>
@@ skipping 59 matching lines @@
     HISTORY_TITLE,           // A past page whose title contains the input.
     HISTORY_BODY,            // A past page whose body contains the input.
     HISTORY_KEYWORD,         // A past page whose keyword contains the input.
     NAVSUGGEST,              // A suggested URL.
     SEARCH_WHAT_YOU_TYPED,   // The input as a search query (with the default
                              // engine).
     SEARCH_HISTORY,          // A past search (with the default engine)
                              // containing the input.
     SEARCH_SUGGEST,          // A suggested search (with the default engine).
     SEARCH_OTHER_ENGINE,     // A search with a non-default engine.
-    OPEN_HISTORY_PAGE,       // A synthetic result that opens the history page
-                             // to search for the input.
     NUM_TYPES,
   };
 
   AutocompleteMatch();
   AutocompleteMatch(AutocompleteProvider* provider,
                     int relevance,
                     bool deletable,
                     Type type);
   ~AutocompleteMatch();
 
@@ skipping 36 matching lines @@
   // The provider of this match, used to remember which provider the user had
   // selected when the input changes. This may be NULL, in which case there is
   // no provider (or memory of the user's selection).
   AutocompleteProvider* provider;
 
   // The relevance of this match. See table above for scores returned by
   // various providers. This is used to rank matches among all responding
   // providers, so different providers must be carefully tuned to supply
   // matches with appropriate relevance.
   //
-  // If the relevance is negative, it will only be displayed if there are not
-  // enough non-negative items in all the providers to max out the popup. In
-  // this case, the relevance of the additional items will be inverted so they
-  // can be mixed in with the rest of the relevances. This allows a provider
-  // to group its matches, having the added items appear intermixed with its
-  // other matches.
-  //
   // TODO(pkasting): http://b/1111299 This should be calculated algorithmically,
   // rather than being a fairly fixed value defined by the table above.
   int relevance;
 
   // True if the user should be able to delete this match.
   bool deletable;
 
   // This string is loaded into the location bar when the item is selected
   // by pressing the arrow keys. This may be different than a URL, for example,
   // for search suggestions, this would just be the search terms.
@@ skipping 44 matching lines @@
   void ValidateClassifications(
       const std::wstring& text,
       const ACMatchClassifications& classifications) const;
 #endif
 };
 
 typedef AutocompleteMatch::ACMatchClassification ACMatchClassification;
 typedef std::vector<ACMatchClassification> ACMatchClassifications;
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_MATCH_H_