Integrate SiteEngagementEvictionPolicy with QuotaManager.

storage/browser/quota/usage_tracker.cc

Index: storage/browser/quota/usage_tracker.cc
diff --git a/storage/browser/quota/usage_tracker.cc b/storage/browser/quota/usage_tracker.cc
index 528725d7f7092ecab3a1d53dee3efd92bc6e5571..de9fbebdbf82c9df77caf58b49dcafa5985fad9b 100644
--- a/storage/browser/quota/usage_tracker.cc
+++ b/storage/browser/quota/usage_tracker.cc
@@ -144,6 +144,14 @@ void UsageTracker::GetCachedHostsUsage(
     client_id_and_tracker.second->GetCachedHostsUsage(host_usage);
 }
 
+void UsageTracker::GetCachedOriginsUsage(
+    std::map<GURL, int64>* origin_usage) const {
+  DCHECK(origin_usage);
+  origin_usage->clear();
+  for (const auto& client_id_and_tracker : client_tracker_map_)
+    client_id_and_tracker.second->GetCachedOriginsUsage(origin_usage);
+}
+
 void UsageTracker::GetCachedOrigins(std::set<GURL>* origins) const {
   DCHECK(origins);
   origins->clear();