Revert of Deletes mojo::Callback

device/battery/battery_monitor_impl.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 "device/battery/battery_monitor_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 12 matching lines @@
   // NOTE: DidChange may be called before AddCallback returns. This is done to
   // report current status.
   subscription_ = BatteryStatusService::GetInstance()->AddCallback(
       base::Bind(&BatteryMonitorImpl::DidChange, base::Unretained(this)));
 }
 
 BatteryMonitorImpl::~BatteryMonitorImpl() {
 }
 
 void BatteryMonitorImpl::QueryNextStatus(
-    const QueryNextStatusCallback& callback) {
+    const BatteryStatusCallback& callback) {
   if (!callback_.is_null()) {
     DVLOG(1) << "Overlapped call to QueryNextStatus!";
     delete this;
     return;
   }
   callback_ = callback;
 
   if (status_to_report_)
     ReportStatus();
 }
@@ skipping 10 matching lines @@
 }
 
 void BatteryMonitorImpl::ReportStatus() {
   callback_.Run(status_.Clone());
   callback_.Reset();
 
   status_to_report_ = false;
 }
 
 }  // namespace device