Fix renderers not getting power broadcast messages

services/device/device_service.cc

 // Copyright 2016 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 "services/device/device_service.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 37 matching lines @@
   return true;
 }
 
 void DeviceService::Create(const service_manager::Identity& remote_identity,
                            mojom::FingerprintRequest request) {
   Fingerprint::Create(std::move(request));
 }
 
 void DeviceService::Create(const service_manager::Identity& remote_identity,
                            mojom::PowerMonitorRequest request) {
-  PowerMonitorMessageBroadcaster::Create(std::move(request));
+  if (!power_monitor_message_broadcaster_) {
+    power_monitor_message_broadcaster_ =
+        base::MakeUnique<PowerMonitorMessageBroadcaster>();
+  }
+  power_monitor_message_broadcaster_->Bind(std::move(request));
 }
 
 void DeviceService::Create(const service_manager::Identity& remote_identity,
                            mojom::TimeZoneMonitorRequest request) {
   if (!time_zone_monitor_)
     time_zone_monitor_ = device::TimeZoneMonitor::Create(file_task_runner_);
   time_zone_monitor_->Bind(std::move(request));
 }
 
 }  // namespace device