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

components/browser_sync/profile_sync_service.cc

 // Copyright (c) 2012 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.
 
 #include "components/browser_sync/profile_sync_service.h"
 
 #include <stddef.h>
 
 #include <cstddef>
 #include <map>
@@ skipping 1283 matching lines @@
     // StartSyncingWithServer() if migration is now finished.
     migrator_->OnConfigureDone(result);
     return;
   }
 
   if (result.was_catch_up_configure) {
     ClearAndRestartSyncForPassphraseEncryption();
     return;
   }
 
+  RecordMemoryUsageHistograms();
+
   StartSyncingWithServer();
 }
 
 void ProfileSyncService::OnConfigureStart() {
   DCHECK(thread_checker_.CalledOnValidThread());
   sync_configure_start_time_ = base::Time::Now();
   engine_->StartConfiguration();
   NotifyObservers();
 }
 
@@ skipping 1072 matching lines @@
       UMA_HISTOGRAM_COUNTS("Sync.MemoryPressureWarningBeforeCleanShutdown",
                            warning_received);
     }
   }
   sync_prefs_.SetMemoryPressureWarningCount(0);
   // Will set to true during a clean shutdown, so crash or something else will
   // remain this as false.
   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_;
 }
 
 std::string ProfileSyncService::unrecoverable_error_message() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return unrecoverable_error_message_;
 }
 
@@ skipping 11 matching lines @@
     return;
 
   DCHECK(startup_controller_->IsSetupInProgress());
   startup_controller_->SetSetupInProgress(false);
 
   if (IsEngineInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }
 }  // namespace browser_sync