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

chrome/browser/chromeos/app_mode/kiosk_app_manager.cc

Index: chrome/browser/chromeos/app_mode/kiosk_app_manager.cc
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_manager.cc b/chrome/browser/chromeos/app_mode/kiosk_app_manager.cc
index ac4dfc442d4330b55a9f95b1f35d83fb5e724be8..dad53f4a786f099bf2f112838ff91574c2f491b2 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_manager.cc
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_manager.cc
@@ -577,14 +577,13 @@ void KioskAppManager::UpdateExternalCache() {
 }
 
 void KioskAppManager::OnKioskAppCacheUpdated(const std::string& app_id) {
-  FOR_EACH_OBSERVER(
-      KioskAppManagerObserver, observers_, OnKioskAppCacheUpdated(app_id));
+  for (auto& observer : observers_)
+    observer.OnKioskAppCacheUpdated(app_id);
 }
 
 void KioskAppManager::OnKioskAppExternalUpdateComplete(bool success) {
-  FOR_EACH_OBSERVER(KioskAppManagerObserver,
-                    observers_,
-                    OnKioskAppExternalUpdateComplete(success));
+  for (auto& observer : observers_)
+    observer.OnKioskAppExternalUpdateComplete(success);
 }
 
 void KioskAppManager::PutValidatedExternalExtension(
@@ -743,8 +742,8 @@ void KioskAppManager::UpdateAppData() {
   UpdateExternalCachePrefs();
   RetryFailedAppDataFetch();
 
-  FOR_EACH_OBSERVER(KioskAppManagerObserver, observers_,
-                    OnKioskAppsSettingsChanged());
+  for (auto& observer : observers_)
+    observer.OnKioskAppsSettingsChanged();
 }
 
 void KioskAppManager::ClearRemovedApps(
@@ -804,15 +803,13 @@ void KioskAppManager::GetKioskAppIconCacheDir(base::FilePath* cache_dir) {
 }
 
 void KioskAppManager::OnKioskAppDataChanged(const std::string& app_id) {
-  FOR_EACH_OBSERVER(KioskAppManagerObserver,
-                    observers_,
-                    OnKioskAppDataChanged(app_id));
+  for (auto& observer : observers_)
+    observer.OnKioskAppDataChanged(app_id);
 }
 
 void KioskAppManager::OnKioskAppDataLoadFailure(const std::string& app_id) {
-  FOR_EACH_OBSERVER(KioskAppManagerObserver,
-                    observers_,
-                    OnKioskAppDataLoadFailure(app_id));
+  for (auto& observer : observers_)
+    observer.OnKioskAppDataLoadFailure(app_id);
 }
 
 void KioskAppManager::OnExtensionListsUpdated(
@@ -829,10 +826,8 @@ void KioskAppManager::OnExtensionLoadedInCache(const std::string& id) {
   if (GetCachedCrx(id, &crx_path, &version))
     app_data->SetCachedCrx(crx_path);
 
-  FOR_EACH_OBSERVER(KioskAppManagerObserver,
-                    observers_,
-                    OnKioskExtensionLoadedInCache(id));
-
+  for (auto& observer : observers_)
+    observer.OnKioskExtensionLoadedInCache(id);
 }
 
 void KioskAppManager::OnExtensionDownloadFailed(
@@ -841,9 +836,8 @@ void KioskAppManager::OnExtensionDownloadFailed(
   KioskAppData* app_data = GetAppDataMutable(id);
   if (!app_data)
     return;
-  FOR_EACH_OBSERVER(KioskAppManagerObserver,
-                    observers_,
-                    OnKioskExtensionDownloadFailed(id));
+  for (auto& observer : observers_)
+    observer.OnKioskExtensionDownloadFailed(id);
 }
 
 KioskAppManager::AutoLoginState KioskAppManager::GetAutoLoginState() const {