[ImportantSites] JNI bindings for CBD filtering and Important Sites.

chrome/browser/engagement/site_engagement_service.h

Index: chrome/browser/engagement/site_engagement_service.h
diff --git a/chrome/browser/engagement/site_engagement_service.h b/chrome/browser/engagement/site_engagement_service.h
index 1a2342badd79a4c160a161c0daead0413c17393b..77a1c5f0a86193f0255ee64f5b5d89d3743e6bd6 100644
--- a/chrome/browser/engagement/site_engagement_service.h
+++ b/chrome/browser/engagement/site_engagement_service.h
@@ -139,6 +139,7 @@ class SiteEngagementScore {
   friend class SiteEngagementHelperTest;
   friend class SiteEngagementScoreTest;
   friend class SiteEngagementServiceTest;
+  friend class ImportantSitesUtilTest;
 
   // Array holding the values corresponding to each item in Variation array.
   static double param_values[];
@@ -288,6 +289,7 @@ class SiteEngagementService : public KeyedService,
   FRIEND_TEST_ALL_PREFIXES(SiteEngagementServiceTest, EngagementLevel);
   FRIEND_TEST_ALL_PREFIXES(SiteEngagementServiceTest, ScoreDecayHistograms);
   FRIEND_TEST_ALL_PREFIXES(AppBannerSettingsHelperTest, SiteEngagementTrigger);
+  FRIEND_TEST_ALL_PREFIXES(ImportantSitesUtilTest, NotificationsThenEngagement);
 
   // Only used in tests.
   SiteEngagementService(Profile* profile, std::unique_ptr<base::Clock> clock);