Remove dependency on visitedlink from history

components/history/core/browser/url_database.h

 // Copyright 2014 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_HISTORY_CORE_BROWSER_URL_DATABASE_H_
 #define COMPONENTS_HISTORY_CORE_BROWSER_URL_DATABASE_H_
 
 #include "base/basictypes.h"
 #include "components/history/core/browser/keyword_id.h"
 #include "components/history/core/browser/url_row.h"
@@ skipping 119 matching lines @@
     sql::Statement statement_;
 
     DISALLOW_COPY_AND_ASSIGN(URLEnumeratorBase);
   };
 
   // A basic enumerator to enumerate urls
   class URLEnumerator : public URLEnumeratorBase {
    public:
     URLEnumerator();
 
-    // Retreives the next url. Returns false if no more urls are available
+    // Retrieves the next url. Returns false if no more urls are available.
     bool GetNextURL(URLRow* r);
 
    private:
     DISALLOW_COPY_AND_ASSIGN(URLEnumerator);
   };
 
   // Initializes the given enumerator to enumerator all URLs in the database.
   bool InitURLEnumeratorForEverything(URLEnumerator* enumerator);
 
   // Initializes the given enumerator to enumerator all URLs in the database
   // that are historically significant: ones having been visited within 3 days,
   // having their URL manually typed more than once, or having been visited
   // more than 3 times.
   bool InitURLEnumeratorForSignificant(URLEnumerator* enumerator);
 
-  // Favicons ------------------------------------------------------------------
-
   // Autocomplete --------------------------------------------------------------
 
   // Fills the given array with URLs matching the given prefix.  They will be
   // sorted by typed count, then by visit count, then by visit date (most recent
   // first) up to the given maximum number.  If |typed_only| is true, only urls
   // that have been typed once are returned.  For caller convenience, returns
   // whether any results were found.
   bool AutocompleteForPrefix(const std::string& prefix,
                              size_t max_results,
                              bool typed_only,
@@ skipping 151 matching lines @@
 // is_null() then this function determines a new time threshold each time it is
 // called. Since getting system time can be costly (such as for cases where
 // this function will be called in a loop over many history items), you can
 // provide a non-null |time_cache| by simply initializing |time_cache| with
 // AutocompleteAgeThreshold() (or any other desired time in the past).
 bool RowQualifiesAsSignificant(const URLRow& row, const base::Time& threshold);
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_BROWSER_URL_DATABASE_H_