Remove usage of base::ObserverList<T>::Iter::GetNext() in //chrome.

chrome/browser/task_manager/task_manager_interface.cc

 // Copyright 2015 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/task_manager/task_manager_interface.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/task_manager/sampling/task_manager_impl.h"
 #include "chrome/browser/task_manager/sampling/task_manager_io_thread_helper.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 58 matching lines @@
   ScheduleRefresh(observer->desired_refresh_time());
 }
 
 void TaskManagerInterface::RemoveObserver(TaskManagerObserver* observer) {
   observers_.RemoveObserver(observer);
   observer->observed_task_manager_ = nullptr;
 
   // Recalculate the minimum refresh rate and the enabled resource flags.
   int64_t flags = 0;
   base::TimeDelta min_time = base::TimeDelta::Max();
-  base::ObserverList<TaskManagerObserver>::Iterator itr(&observers_);
-  while (TaskManagerObserver* obs = itr.GetNext()) {
-    if (obs->desired_refresh_time() < min_time)
-      min_time = obs->desired_refresh_time();
+  for (auto& observer : observers_) {
+    if (observer.desired_refresh_time() < min_time)
+      min_time = observer.desired_refresh_time();
 
-    flags |= obs->desired_resources_flags();
+    flags |= observer.desired_resources_flags();
   }
 
   if (min_time == base::TimeDelta::Max()) {
     // This is the last observer to be removed. Stop updating.
     SetEnabledResourceFlags(0);
     refresh_timer_->Stop();
     StopUpdating();
   } else {
     SetEnabledResourceFlags(flags);
     ScheduleRefresh(min_time);
   }
 }
 
 void TaskManagerInterface::RecalculateRefreshFlags() {
   int64_t flags = 0;
-  base::ObserverList<TaskManagerObserver>::Iterator itr(&observers_);
-  while (TaskManagerObserver* obs = itr.GetNext())
-    flags |= obs->desired_resources_flags();
+  for (auto& observer : observers_)
+    flags |= observer.desired_resources_flags();
 
   SetEnabledResourceFlags(flags);
 }
 
 bool TaskManagerInterface::IsResourceRefreshEnabled(RefreshType type) const {
   return (enabled_resources_flags_ & type) != 0;
 }
 
 TaskManagerInterface::TaskManagerInterface()
     : refresh_timer_(new base::Timer(true, true)),
@@ skipping 43 matching lines @@
 }
 
 void TaskManagerInterface::ScheduleRefresh(base::TimeDelta refresh_time) {
   refresh_timer_->Start(FROM_HERE,
                         refresh_time,
                         base::Bind(&TaskManagerInterface::Refresh,
                                    base::Unretained(this)));
 }
 
 }  // namespace task_manager