ObserverList::HasObserver now takes a const pointer.

chrome/browser/extensions/api/dial/dial_service.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 "chrome/browser/extensions/api/dial/dial_service.h"
 
 #include <algorithm>
 #include <set>
 #include <utility>
 
@@ skipping 389 matching lines @@
 void DialServiceImpl::AddObserver(Observer* observer) {
   DCHECK(thread_checker_.CalledOnValidThread());
   observer_list_.AddObserver(observer);
 }
 
 void DialServiceImpl::RemoveObserver(Observer* observer) {
   DCHECK(thread_checker_.CalledOnValidThread());
   observer_list_.RemoveObserver(observer);
 }
 
-bool DialServiceImpl::HasObserver(Observer* observer) {
+bool DialServiceImpl::HasObserver(const Observer* observer) const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return observer_list_.HasObserver(observer);
 }
 
 bool DialServiceImpl::Discover() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (discovery_active_) {
     VLOG(2) << "Discovery is already active - returning.";
     return false;
   }
@@ skipping 194 matching lines @@
   for (ScopedVector<DialSocket>::const_iterator iter = dial_sockets_.begin();
        iter != dial_sockets_.end();
        ++iter) {
     if (!((*iter)->IsClosed()))
       return true;
   }
   return false;
 }
 
 }  // namespace extensions