Remove usage of FOR_EACH_OBSERVER macro in google_apis

google_apis/drive/auth_service.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 "google_apis/drive/auth_service.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 208 matching lines @@
 
 void AuthService::OnRefreshTokenRevoked(const std::string& account_id) {
   if (account_id == account_id_)
     OnHandleRefreshToken(false);
 }
 
 void AuthService::OnHandleRefreshToken(bool has_refresh_token) {
   access_token_.clear();
   has_refresh_token_ = has_refresh_token;
 
-  FOR_EACH_OBSERVER(AuthServiceObserver,
-                    observers_,
-                    OnOAuth2RefreshTokenChanged());
+  for (auto& observer : observers_)
+    observer.OnOAuth2RefreshTokenChanged();
 }
 
 }  // namespace google_apis