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

base/observer_list.h

 // Copyright (c) 2011 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_H_
 #define BASE_OBSERVER_LIST_H_
 
 #include <stddef.h>
 
 #include <algorithm>
@@ skipping 74 matching lines @@
   };
 
   // An iterator class that can be used to access the list of observers.
   template <class ContainerType>
   class Iter {
    public:
     Iter();
     explicit Iter(ContainerType* list);
     ~Iter();
 
-    // Deprecated.
-    ObserverType* GetNext();
-
     // A workaround for C2244. MSVC requires fully qualified type name for
     // return type on a function definition to match a function declaration.
     using ThisType =
         typename ObserverListBase<ObserverType>::template Iter<ContainerType>;
 
     bool operator==(const Iter& other) const;
     bool operator!=(const Iter& other) const;
     ThisType& operator++();
     ObserverType* operator->() const;
     ObserverType& operator*() const;
@@ skipping 158 matching lines @@
 void ObserverListBase<ObserverType>::Iter<ContainerType>::EnsureValidIndex() {
   if (!list_)
     return;
 
   size_t max_index = clamped_max_index();
   while (index_ < max_index && !list_->observers_[index_])
     ++index_;
 }
 
 template <class ObserverType>
-template <class ContainerType>
-ObserverType* ObserverListBase<ObserverType>::Iter<ContainerType>::GetNext() {
-  EnsureValidIndex();
-  ObserverType* current = GetCurrent();
-  operator++();
-  return current;
-}
-
-template <class ObserverType>
 void ObserverListBase<ObserverType>::AddObserver(ObserverType* obs) {
   DCHECK(obs);
   if (ContainsValue(observers_, obs)) {
     NOTREACHED() << "Observers can only be added once!";
     return;
   }
   observers_.push_back(obs);
 }
 
 template <class ObserverType>
@@ skipping 64 matching lines @@
 // Deprecated. Use the range-based for loop instead.
 #define FOR_EACH_OBSERVER(ObserverType, observer_list, func) \
   do {                                                       \
     for (ObserverType & o : observer_list)                   \
       o.func;                                                \
   } while (0)
 
 }  // namespace base
 
 #endif  // BASE_OBSERVER_LIST_H_