Add RemoveObserver to ~WificcessPointInfoProviderChromeos

chrome/browser/metrics/wifi_access_point_info_provider_chromeos.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 "chrome/browser/metrics/wifi_access_point_info_provider_chromeos.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/strings/string_number_conversions.h"
 #include "chromeos/network/network_configuration_handler.h"
 #include "chromeos/network/network_handler.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "chromeos/network/shill_property_util.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 using chromeos::NetworkHandler;
 
 WifiAccessPointInfoProviderChromeos::WifiAccessPointInfoProviderChromeos() {
   NetworkHandler::Get()->network_state_handler()->AddObserver(this, FROM_HERE);
 
   // Update initial connection state.
   DefaultNetworkChanged(
       NetworkHandler::Get()->network_state_handler()->DefaultNetwork());
 }
 
 WifiAccessPointInfoProviderChromeos::~WifiAccessPointInfoProviderChromeos() {
+  NetworkHandler::Get()->network_state_handler()->RemoveObserver(this,
+                                                                 FROM_HERE);
 }
 
 bool WifiAccessPointInfoProviderChromeos::GetInfo(WifiAccessPointInfo* info) {
   // Wifi access point information is not provided if the BSSID is empty.
   // This assumes the BSSID is never empty when access point information exists.
   if (wifi_access_point_info_.bssid.empty())
     return false;
 
   *info = wifi_access_point_info_;
   return true;
@@ skipping 69 matching lines @@
       &wifi_access_point_info_.model_number);
   vendor_dict->GetStringWithoutPathExpansion(
       shill::kVendorWPSModelNameProperty,
       &wifi_access_point_info_.model_name);
   vendor_dict->GetStringWithoutPathExpansion(
       shill::kVendorWPSDeviceNameProperty,
       &wifi_access_point_info_.device_name);
   vendor_dict->GetStringWithoutPathExpansion(shill::kVendorOUIListProperty,
                                              &wifi_access_point_info_.oui_list);
 }