Add UMA metrics to the site engagement service.

chrome/browser/engagement/site_engagement_service.h

 // Copyright 2015 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_ENGAGEMENT_SITE_ENGAGEMENT_SERVICE_H_
 #define CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_SERVICE_H_
 
 #include <map>
 
 #include "base/macros.h"
 #include "base/time/default_clock.h"
 #include "base/time/time.h"
+#include "chrome/browser/engagement/site_engagement_metrics.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "ui/base/page_transition_types.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 class GURL;
 class Profile;
 
@@ skipping 26 matching lines @@
   // The SiteEngagementService does not take ownership of |clock|. It is the
   // responsibility of the caller to make sure |clock| outlives this
   // SiteEngagementScore.
   SiteEngagementScore(base::Clock* clock,
                       const base::DictionaryValue& score_dict);
   ~SiteEngagementScore();
 
   double Score() const;
   void AddPoints(double points);
 
+  // Returns true if the maximum number of points today has been added. Resets
+  // the number of points added today if the day has changed.
+  bool MaxPointsPerDayAdded();
+
   // Updates the content settings dictionary |score_dict| with the current score
   // fields. Returns true if |score_dict| changed, otherwise return false.
   bool UpdateScoreDict(base::DictionaryValue* score_dict);
 
  private:
   friend class SiteEngagementScoreTest;
 
   // This version of the constructor is used in unit tests.
   explicit SiteEngagementScore(base::Clock* clock);
 
@@ skipping 51 matching lines @@
   ~SiteEngagementService() override;
 
   // Returns a map of all stored origins and their engagement scores.
   std::map<GURL, double> GetScoreMap();
 
   // Update the karma score of the origin matching |url| for navigation.
   void HandleNavigation(const GURL& url, ui::PageTransition transition);
 
   // Update the karma score of the origin matching |url| for time-on-site, based
   // on user input.
-  void HandleUserInput(const GURL& url);
+  void HandleUserInput(const GURL& url,
+                       SiteEngagementMetrics::EngagementType type);
 
   // Overridden from SiteEngagementScoreProvider:
   double GetScore(const GURL& url) override;
   double GetTotalEngagementPoints() override;
 
  private:
   // Adds the specified number of points to the given origin, respecting the
   // maximum limits for the day and overall.
   void AddPoints(const GURL& url, double points);
 
+  // Returns the number of origins with maximum daily and total engagement
+  // respectively.
+  int OriginsWithMaxDailyEngagement();
+  int OriginsWithMaxEngagement();
+
+  // Logs the total number of origins stored by the site engagement service, and
+  // the total accumulated engagement score.
+  void RecordStartupUmaStats();
+
   Profile* profile_;
 
   // The clock used to vend times.
   base::DefaultClock clock_;
 
   DISALLOW_COPY_AND_ASSIGN(SiteEngagementService);
 };
 
 #endif  // CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_SERVICE_H_