Remove base::ObserverList<T>::Iter::GetNext().

base/observer_list_threadsafe.h

 // 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.
 
 #ifndef BASE_OBSERVER_LIST_THREADSAFE_H_
 #define BASE_OBSERVER_LIST_THREADSAFE_H_
 
 #include <algorithm>
 #include <map>
 #include <tuple>
@@ skipping 204 matching lines @@
           observer_lists_.find(PlatformThread::CurrentId());
 
       // The ObserverList could have been removed already.  In fact, it could
       // have been removed and then re-added!  If the master list's loop
       // does not match this one, then we do not need to finish this
       // notification.
       if (it == observer_lists_.end() || it->second != context)
         return;
     }
 
-    {
-      typename ObserverList<ObserverType>::Iterator it(&context->list);
-      ObserverType* obs;
-      while ((obs = it.GetNext()) != nullptr)
-        method.Run(obs);
+    for (auto& observer : context->list) {
+      method.Run(&observer);
     }
 
     // If there are no more observers on the list, we can now delete it.
     if (context->list.size() == 0) {
       {
         AutoLock lock(list_lock_);
         // Remove |list| if it's not already removed.
         // This can happen if multiple observers got removed in a notification.
         // See http://crbug.com/55725.
         typename ObserversListMap::iterator it =
@@ skipping 15 matching lines @@
   mutable Lock list_lock_;  // Protects the observer_lists_.
   ObserversListMap observer_lists_;
   const NotificationType type_;
 
   DISALLOW_COPY_AND_ASSIGN(ObserverListThreadSafe);
 };
 
 }  // namespace base
 
 #endif  // BASE_OBSERVER_LIST_THREADSAFE_H_