Add confidence to AutocompleteMatch.

chrome/browser/autocomplete/history_contents_provider.h

Index: chrome/browser/autocomplete/history_contents_provider.h
diff --git a/chrome/browser/autocomplete/history_contents_provider.h b/chrome/browser/autocomplete/history_contents_provider.h
index 7ceb0b90639758ce5eff2c5d683d37af39068001..ce31ec38c7f7178b6e943f3e724585de6ffb5fcb 100644
--- a/chrome/browser/autocomplete/history_contents_provider.h
+++ b/chrome/browser/autocomplete/history_contents_provider.h
@@ -9,6 +9,8 @@
 #include "chrome/browser/autocomplete/history_provider.h"
 #include "chrome/browser/history/history.h"
 
+struct MatchReference;

[Peter Kasting, 2011/08/09 20:53:00]

Nit: Shouldn't this be moved inside HistoryContentsProvider if subclasses need
it, rather than made global?

[dominich, 2011/08/09 21:43:43]

I went back and forward on this a couple of times. I think you're right to keep
the scope limited.

+
 namespace bookmark_utils {
 struct TitleMatch;
 }
@@ -45,8 +47,7 @@ class HistoryContentsProvider : public HistoryProvider {
   void ConvertResults();
 
   // Creates and returns an AutocompleteMatch from a MatchingPageResult.
-  AutocompleteMatch ResultToMatch(const history::URLResult& result,
-                                  int score);
+  AutocompleteMatch ResultToMatch(const MatchReference& match_reference);
 
   // Adds ACMatchClassifications to match from the offset positions in
   // page_result.
@@ -57,6 +58,12 @@ class HistoryContentsProvider : public HistoryProvider {
   // chart in autocomplete.h for the list of values this returns.
   int CalculateRelevance(const history::URLResult& result);
 
+  // Calculates and returns the confidence for a particular result. This is
+  // calculated by comparing the result's |visit_count| to that of all the
+  // results.
+  float CalculateConfidence(const history::URLResult& result,
+                            const history::QueryResults& results) const;
+
   // Queries the bookmarks for any bookmarks whose title matches input. All
   // matches are added directly to results_.
   void QueryBookmarks(const AutocompleteInput& input);