Reland: [Sync] Record sync memory usage in histogram broken by datatypes

components/browser_sync/profile_sync_service.cc

Index: components/browser_sync/profile_sync_service.cc
diff --git a/components/browser_sync/profile_sync_service.cc b/components/browser_sync/profile_sync_service.cc
index 82d560c33d237c1a082f53269b8445e3ac31e7a9..d92d68e3ccd16ba26a46d8b91a0a39937039b448 100644
--- a/components/browser_sync/profile_sync_service.cc
+++ b/components/browser_sync/profile_sync_service.cc
@@ -1301,6 +1301,8 @@ void ProfileSyncService::OnConfigureDone(
     return;
   }
 
+  RecordMemoryUsageHistograms();
+
   StartSyncingWithServer();
 }
 
@@ -2393,6 +2395,16 @@ void ProfileSyncService::ReportPreviousSessionMemoryWarningCount() {
   sync_prefs_.SetCleanShutdown(false);
 }
 
+void ProfileSyncService::RecordMemoryUsageHistograms() {
+  ModelTypeSet active_types = GetActiveDataTypes();
+  for (ModelTypeSet::Iterator type_it = active_types.First(); type_it.Good();
+       type_it.Inc()) {
+    auto dtc_it = data_type_controllers_.find(type_it.Get());
+    if (dtc_it != data_type_controllers_.end())
+      dtc_it->second->RecordMemoryUsageHistogram();
+  }
+}
+
 const GURL& ProfileSyncService::sync_service_url() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return sync_service_url_;