Remove FOR_EACH_OBSERVER macro usage in chrome/browser/extensions

chrome/browser/extensions/api/content_settings/content_settings_store.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/extensions/api/content_settings/content_settings_store.h"
 
 #include <memory>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 337 matching lines @@
 }
 
 void ContentSettingsStore::RemoveObserver(Observer* observer) {
   DCHECK(OnCorrectThread());
   observers_.RemoveObserver(observer);
 }
 
 void ContentSettingsStore::NotifyOfContentSettingChanged(
     const std::string& extension_id,
     bool incognito) {
-  FOR_EACH_OBSERVER(
-      ContentSettingsStore::Observer,
-      observers_,
-      OnContentSettingChanged(extension_id, incognito));
+  for (auto& observer : observers_)
+    observer.OnContentSettingChanged(extension_id, incognito);
 }
 
 bool ContentSettingsStore::OnCorrectThread() {
   // If there is no UI thread, we're most likely in a unit test.
   return !BrowserThread::IsThreadInitialized(BrowserThread::UI) ||
          BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
 ContentSettingsStore::ExtensionEntryMap::iterator
 ContentSettingsStore::FindEntry(const std::string& ext_id) {
   ExtensionEntryMap::iterator i;
   for (i = entries_.begin(); i != entries_.end(); ++i) {
     if (i->second->id == ext_id)
       return i;
   }
   return entries_.end();
 }
 
 ContentSettingsStore::ExtensionEntryMap::const_iterator
 ContentSettingsStore::FindEntry(const std::string& ext_id) const {
   ExtensionEntryMap::const_iterator i;
   for (i = entries_.begin(); i != entries_.end(); ++i) {
     if (i->second->id == ext_id)
       return i;
   }
   return entries_.end();
 }
 
 }  // namespace extensions