Reduce usage of FOR_EACH_OBSERVER macro in components/

components/pairing/fake_host_pairing_controller.cc

 // Copyright 2014 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 "components/pairing/fake_host_pairing_controller.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <vector>
@@ skipping 62 matching lines @@
   device_name_ =
       dict.count("device_name") ? dict["device_name"] : "Chromebox-01";
 
   enrollment_domain_ = dict.count("domain") ? dict["domain"] : "example.com";
 }
 
 void FakeHostPairingController::ChangeStage(Stage new_stage) {
   if (current_stage_ == new_stage)
     return;
   current_stage_ = new_stage;
-  FOR_EACH_OBSERVER(Observer, observers_, PairingStageChanged(new_stage));
+  for (Observer& observer : observers_)
+    observer.PairingStageChanged(new_stage);
 }
 
 void FakeHostPairingController::ChangeStageLater(Stage new_stage) {
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::Bind(&FakeHostPairingController::ChangeStage,
                             base::Unretained(this), new_stage),
       async_duration_);
 }
 
 void FakeHostPairingController::AddObserver(Observer* observer) {
@@ skipping 82 matching lines @@
     }
     case STAGE_ENROLLMENT_SUCCESS: {
       ChangeStageLater(STAGE_FINISHED);
       break;
     }
     default: { break; }
   }
 }
 
 }  // namespace pairing_chromeos