ObserverList::HasObserver now takes a const pointer.

chromeos/dbus/fake_update_engine_client.cc

 // Copyright (c) 2012 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 "chromeos/dbus/fake_update_engine_client.h"
 
 namespace chromeos {
 
 FakeUpdateEngineClient::FakeUpdateEngineClient()
     : update_check_result_(UpdateEngineClient::UPDATE_RESULT_SUCCESS),
@@ skipping 11 matching lines @@
 }
 
 void FakeUpdateEngineClient::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void FakeUpdateEngineClient::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
-bool FakeUpdateEngineClient::HasObserver(Observer* observer) {
+bool FakeUpdateEngineClient::HasObserver(const Observer* observer) const {
   return observers_.HasObserver(observer);
 }
 
 void FakeUpdateEngineClient::RequestUpdateCheck(
     const UpdateCheckCallback& callback) {
   request_update_check_call_count_++;
   callback.Run(update_check_result_);
 }
 
 void FakeUpdateEngineClient::Rollback() {
@@ skipping 36 matching lines @@
     const UpdateEngineClient::Status& status) {
   default_status_ = status;
 }
 
 void FakeUpdateEngineClient::set_update_check_result(
     const UpdateEngineClient::UpdateCheckResult& result) {
   update_check_result_ = result;
 }
 
 }  // namespace chromeos