Replace FOR_EACH_OBSERVER in c/b/chromeos with range-based for

chrome/browser/chromeos/mobile/mobile_activator.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/chromeos/mobile/mobile_activator.h"
 
 #include <algorithm>
 #include <map>
 #include <string>
 
@@ skipping 980 matching lines @@
   VLOG(1) << "Transitioning...";
 
   // Kill all the possible timers and callbacks we might have outstanding.
   state_duration_timer_.Stop();
   continue_reconnect_timer_.Stop();
   reconnect_timeout_timer_.Stop();
   const PlanActivationState old_state = state_;
   state_ = new_state;
 
   // Signal to observers layer that the state is changing.
-  FOR_EACH_OBSERVER(Observer, observers_,
-      OnActivationStateChanged(network, state_, error_description));
+  for (auto& observer : observers_)
+    observer.OnActivationStateChanged(network, state_, error_description);
 
   // Pick action that should happen on entering the new state.
   switch (new_state) {
     case PLAN_ACTIVATION_START:
       break;
     case PLAN_ACTIVATION_DELAY_OTASP: {
       UMA_HISTOGRAM_COUNTS("Cellular.RetryOTASP", 1);
       BrowserThread::PostDelayedTask(BrowserThread::UI, FROM_HERE,
           base::Bind(&MobileActivator::RetryOTASP, AsWeakPtr()),
           base::TimeDelta::FromMilliseconds(kOTASPRetryDelay));
@@ skipping 149 matching lines @@
   cellular_plan_payment_time_ = base::Time::Now();
 }
 
 bool MobileActivator::HasRecentCellularPlanPayment() const {
   const int kRecentPlanPaymentHours = 6;
   return (base::Time::Now() -
           cellular_plan_payment_time_).InHours() < kRecentPlanPaymentHours;
 }
 
 }  // namespace chromeos