Add SiteEngagementService::GetAllDetails(), to return detailed scores.

chrome/browser/engagement/site_engagement_score.cc

Index: chrome/browser/engagement/site_engagement_score.cc
diff --git a/chrome/browser/engagement/site_engagement_score.cc b/chrome/browser/engagement/site_engagement_score.cc
index 10fe452045ed6ec5b34dee916337b8735971a19e..fd89a301812b7584a99416893fdab25e097edad1 100644
--- a/chrome/browser/engagement/site_engagement_score.cc
+++ b/chrome/browser/engagement/site_engagement_score.cc
@@ -271,7 +271,20 @@ void SiteEngagementScore::AddPoints(double points) {
 }
 
 double SiteEngagementScore::GetScore() const {
-  return std::min(DecayedScore() + BonusScore(), kMaxPoints);
+  return GetDetails().score;
+}
+
+mojom::SiteEngagementDetails SiteEngagementScore::GetDetails() const {
+  mojom::SiteEngagementDetails engagement;
+  engagement.origin = origin_;
+  engagement.base_score = DecayedScore();
+  engagement.installed_bonus = BonusIfShortcutLaunched();
+  engagement.notifications_bonus = BonusIfHasNotifications();
+  engagement.score =
+      std::min(engagement.base_score + engagement.installed_bonus +
+                   engagement.notifications_bonus,
+               kMaxPoints);
+  return engagement;
 }
 
 void SiteEngagementScore::Commit() {
@@ -400,20 +413,22 @@ double SiteEngagementScore::DecayedScore() const {
                            periods * GetDecayPoints());
 }
 
-double SiteEngagementScore::BonusScore() const {
-  double bonus = 0;
+double SiteEngagementScore::BonusIfShortcutLaunched() const {
   int days_since_shortcut_launch =
       (clock_->Now() - last_shortcut_launch_time_).InDays();
   if (days_since_shortcut_launch <= kMaxDaysSinceShortcutLaunch)
-    bonus += GetWebAppInstalledPoints();
+    return GetWebAppInstalledPoints();
+  return 0;
+}
 
+double SiteEngagementScore::BonusIfHasNotifications() const {
   // TODO(dominickn, raymes): call PermissionManager::GetPermissionStatus when
   // the PermissionManager is thread-safe.
   if (settings_map_ && settings_map_->GetContentSetting(
                            origin_, GURL(), CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
                            std::string()) == CONTENT_SETTING_ALLOW) {
-    bonus += GetNotificationPermissionPoints();
+    return GetNotificationPermissionPoints();
   }
 
-  return bonus;
+  return 0;
 }