Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser

chrome/browser/lifetime/keep_alive_registry.cc

 // Copyright 2016 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/lifetime/keep_alive_registry.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/lifetime/keep_alive_state_observer.h"
 #include "chrome/browser/lifetime/keep_alive_types.h"
@@ skipping 118 matching lines @@
 
   if (new_restart_allowed != old_restart_allowed)
     OnRestartAllowedChanged(new_restart_allowed);
 
   DVLOG(1) << "New state of the KeepAliveRegistry:" << *this;
 }
 
 void KeepAliveRegistry::OnKeepAliveStateChanged(bool new_keeping_alive) {
   DVLOG(1) << "Notifying KeepAliveStateObservers: KeepingAlive changed to: "
            << new_keeping_alive;
-  FOR_EACH_OBSERVER(KeepAliveStateObserver, observers_,
-                    OnKeepAliveStateChanged(new_keeping_alive));
+  for (KeepAliveStateObserver& observer : observers_)
+    observer.OnKeepAliveStateChanged(new_keeping_alive);
 }
 
 void KeepAliveRegistry::OnRestartAllowedChanged(bool new_restart_allowed) {
   DVLOG(1) << "Notifying KeepAliveStateObservers: Restart changed to: "
            << new_restart_allowed;
-  FOR_EACH_OBSERVER(KeepAliveStateObserver, observers_,
-                    OnKeepAliveRestartStateChanged(new_restart_allowed));
+  for (KeepAliveStateObserver& observer : observers_)
+    observer.OnKeepAliveRestartStateChanged(new_restart_allowed);
 }
 
 void KeepAliveRegistry::DecrementCount(KeepAliveOrigin origin,
                                        OriginMap* keep_alive_map) {
   int new_count = --keep_alive_map->at(origin);
   DCHECK_GE(keep_alive_map->at(origin), 0);
   if (new_count == 0)
     keep_alive_map->erase(origin);
 }
 
 std::ostream& operator<<(std::ostream& out, const KeepAliveRegistry& registry) {
   out << "{registered_count_=" << registry.registered_count_
       << ", restart_allowed_count_=" << registry.restart_allowed_count_
       << ", KeepAlives=[";
   for (auto counts_per_origin_it : registry.registered_keep_alives_) {
     if (counts_per_origin_it != *registry.registered_keep_alives_.begin())
       out << ", ";
     out << counts_per_origin_it.first << " (" << counts_per_origin_it.second
         << ")";
   }
   out << "]}";
   return out;
 }