Adding knobs on HQP provider.

chrome/browser/history/scored_history_match.h

Index: chrome/browser/history/scored_history_match.h
diff --git a/chrome/browser/history/scored_history_match.h b/chrome/browser/history/scored_history_match.h
index 15a37e7bd73673dc4efe2ca93a5e29a06d3e8d59..6d4563ca5727a27e61b26eb55845084cddf9a142 100644
--- a/chrome/browser/history/scored_history_match.h
+++ b/chrome/browser/history/scored_history_match.h
@@ -87,6 +87,7 @@ class ScoredHistoryMatch : public history::HistoryMatch {
   FRIEND_TEST_ALL_PREFIXES(ScoredHistoryMatchTest, ScoringDiscountFrecency);
   FRIEND_TEST_ALL_PREFIXES(ScoredHistoryMatchTest, ScoringScheme);
   FRIEND_TEST_ALL_PREFIXES(ScoredHistoryMatchTest, ScoringTLD);
+  FRIEND_TEST_ALL_PREFIXES(ScoredHistoryMatchTest, GetFinalRelevancyScore);

[Bart N., 2015/02/10 01:22:29]

Sort?

[Ashok vardhan, 2015/02/10 23:57:45]

Acknowledged.

 
   // The number of days of recency scores to precompute.
   static const int kDaysToPrecomputeRecencyScoresFor;
@@ -128,9 +129,30 @@ class ScoredHistoryMatch : public history::HistoryMatch {
 
   // Combines the two component scores into a final score that's
   // an appropriate value to use as a relevancy score.
-  static float GetFinalRelevancyScore(
-      float topicality_score,
-      float frequency_score);
+  static float GetFinalRelevancyScore(float topicality_score,
+                                      float frequency_score,
+                                      std::string& hqp_relevance_buckets);
+
+  // Initializes the HQP experimental params.
+  // If the experimental scoring is enabled, it sets:
+  //
+  // 1. hqp_experimental to true. Default value is set to false.
+  //
+  // 2. It initializes the topicality_threshold_, and hqp_scoring from the
+  //    finch experiment params.
+  //
+  // 3. topicality_threshold_,is used to control the topicality scoring.

[Bart N., 2015/02/10 01:22:29]

extra comma?

[Ashok vardhan, 2015/02/10 23:57:45]

Done.

+  // If topicality_threshold > 0, then URLs with topicality score < threshold,
+  // are given score 0. It is initalized to -1;
+  //
+  // 4. hqp_relevance_buckets, buckets that gives the mapping from
+  // (topicality*frequency) to the final relevance scoring.
+  // Please see GetFinalRelevancyScore() for more details and scoring method.
+  bool hqp_experimental_scoring_enabled_;
+  float topicality_threshold_;
+  std::string hqp_relevance_buckets_;
+
+  void InitializeHQPExperimentalParams();
 
   // Sets |also_do_hup_like_scoring_|,
   // |max_assigned_score_for_non_inlineable_matches_|, |bookmark_value_|,