Revert of Deletes mojo::Callback

content/browser/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 "content/browser/geolocation/geolocation_service_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
@@ skipping 104 matching lines @@
 
   if (position_override_.Validate()) {
     OnLocationUpdate(position_override_);
     return;
   }
 
   StartListeningForUpdates();
 }
 
 void GeolocationServiceImpl::QueryNextPosition(
-    const QueryNextPositionCallback& callback) {
+    const PositionCallback& callback) {
   if (!position_callback_.is_null()) {
     DVLOG(1) << "Overlapped call to QueryNextPosition!";
     OnConnectionError();  // Simulate a connection error.
     return;
   }
 
   position_callback_ = callback;
 
   if (has_position_to_report_)
     ReportCurrentPosition();
@@ skipping 50 matching lines @@
     ReportCurrentPosition();
 }
 
 void GeolocationServiceImpl::ReportCurrentPosition() {
   position_callback_.Run(current_position_.Clone());
   position_callback_.Reset();
   has_position_to_report_ = false;
 }
 
 }  // namespace content