ObserverList::HasObserver now takes a const pointer.

chromeos/dbus/fake_session_manager_client.cc

 // Copyright 2013 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_session_manager_client.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
@@ skipping 17 matching lines @@
 }
 
 void FakeSessionManagerClient::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void FakeSessionManagerClient::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
-bool FakeSessionManagerClient::HasObserver(Observer* observer) {
+bool FakeSessionManagerClient::HasObserver(const Observer* observer) const {
   return observers_.HasObserver(observer);
 }
 
 void FakeSessionManagerClient::EmitLoginPromptVisible() {
 }
 
 void FakeSessionManagerClient::RestartJob(int pid,
                                           const std::string& command_line) {
 }
 
@@ skipping 122 matching lines @@
     const std::string& account_id,
     const std::string& policy_blob) {
   device_local_account_policy_[account_id] = policy_blob;
 }
 
 void FakeSessionManagerClient::OnPropertyChangeComplete(bool success) {
   FOR_EACH_OBSERVER(Observer, observers_, PropertyChangeComplete(success));
 }
 
 }  // namespace chromeos