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

components/sync/driver/model_type_controller.cc

 // Copyright 2014 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/sync/driver/model_type_controller.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 218 matching lines @@
   PostBridgeTask(FROM_HERE, base::Bind(&ModelTypeDebugInfo::GetAllNodes,
                                        BindToCurrentThread(callback)));
 }
 
 void ModelTypeController::GetStatusCounters(
     const StatusCountersCallback& callback) {
   PostBridgeTask(FROM_HERE,
                  base::Bind(&ModelTypeDebugInfo::GetStatusCounters, callback));
 }
 
+void ModelTypeController::RecordMemoryUsageHistogram() {
+  PostBridgeTask(FROM_HERE,
+                 base::Bind(&ModelTypeDebugInfo::RecordMemoryUsageHistogram));
+}
+
 void ModelTypeController::ReportModelError(const ModelError& error) {
   DCHECK(CalledOnValidThread());
   LoadModelsDone(UNRECOVERABLE_ERROR,
                  SyncError(error.location(), SyncError::DATATYPE_ERROR,
                            error.message(), type()));
 }
 
 void ModelTypeController::RecordStartFailure(ConfigureResult result) const {
   DCHECK(CalledOnValidThread());
   UMA_HISTOGRAM_ENUMERATION("Sync.DataTypeStartFailures",
@@ skipping 12 matching lines @@
   return base::Bind(&ReturnCapturedBridge, bridge);
 }
 
 void ModelTypeController::PostBridgeTask(
     const tracked_objects::Location& location,
     const BridgeTask& task) {
   model_thread_->PostTask(
       location, base::Bind(&RunBridgeTask, GetBridgeProvider(), task));
 }
 }  // namespace syncer