Use OnceCallback on Mojo interfaces in //device/geolocation

device/geolocation/geolocation_service_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/geolocation/geolocation_service_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 100 matching lines @@
 
   if (position_override_.Validate()) {
     OnLocationUpdate(position_override_);
     return;
   }
 
   StartListeningForUpdates();
 }
 
 void GeolocationServiceImpl::QueryNextPosition(
-    const QueryNextPositionCallback& callback) {
+    QueryNextPositionCallback callback) {
   if (!position_callback_.is_null()) {
     DVLOG(1) << "Overlapped call to QueryNextPosition!";
     OnConnectionError();  // Simulate a connection error.
     return;
   }
 
-  position_callback_ = callback;
+  position_callback_ = std::move(callback);
 
   if (has_position_to_report_)
     ReportCurrentPosition();
 }
 
 void GeolocationServiceImpl::SetOverride(const Geoposition& position) {
   position_override_ = position;
   if (!position_override_.Validate()) {
     ResumeUpdates();
   }
@@ skipping 32 matching lines @@
       mojom::Geoposition::ErrorCode(position.error_code);
   current_position_.error_message = position.error_message;
 
   has_position_to_report_ = true;
 
   if (!position_callback_.is_null())
     ReportCurrentPosition();
 }
 
 void GeolocationServiceImpl::ReportCurrentPosition() {
-  position_callback_.Run(current_position_.Clone());
-  position_callback_.Reset();
+  std::move(position_callback_).Run(current_position_.Clone());
   has_position_to_report_ = false;
 }
 
 }  // namespace device