ObserverList::HasObserver now takes a const pointer.

chrome/browser/extensions/api/dial/dial_registry_unittest.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 "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/extensions/api/dial/dial_device_data.h"
 #include "chrome/browser/extensions/api/dial/dial_registry.h"
 #include "chrome/browser/extensions/api/dial/dial_service.h"
 #include "chrome/test/base/testing_profile.h"
@@ skipping 17 matching lines @@
   MOCK_METHOD1(OnDialError, void(DialRegistry::DialErrorCode type));
 };
 
 class MockDialService : public DialService {
  public:
   virtual ~MockDialService() {}
 
   MOCK_METHOD0(Discover, bool());
   MOCK_METHOD1(AddObserver, void(DialService::Observer*));
   MOCK_METHOD1(RemoveObserver, void(DialService::Observer*));
-  MOCK_METHOD1(HasObserver, bool(DialService::Observer*));
+  MOCK_CONST_METHOD1(HasObserver, bool(const DialService::Observer*));
 };
 
 class MockDialRegistry : public DialRegistry {
  public:
   MockDialRegistry(Observer *dial_api,
                    const base::TimeDelta& refresh_interval,
                    const base::TimeDelta& expiration,
                    const size_t max_devices)
       : DialRegistry(dial_api, refresh_interval, expiration, max_devices) {
     time_ = Time::Now();
@@ skipping 304 matching lines @@
   registry_->OnNetworkChanged(net::NetworkChangeNotifier::CONNECTION_ETHERNET);
 
   registry_->OnDiscoveryRequest(NULL);
   registry_->OnDeviceDiscovered(NULL, third_device_);
   registry_->OnDiscoveryFinished(NULL);
 
   registry_->OnListenerRemoved();
 }
 
 }  // namespace extensions