Remove usage of FOR_EACH_OBSERVER macro in components/signin

components/signin/core/browser/fake_signin_manager.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 "components/signin/core/browser/fake_signin_manager.h"
 
 #include "base/callback_helpers.h"
 #include "build/build_config.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/account_tracker_service.h"
@@ skipping 38 matching lines @@
   possibly_invalid_gaia_id_.assign(gaia_id);
   possibly_invalid_email_.assign(username);
 
   if (!oauth_fetched_callback.is_null())
     oauth_fetched_callback.Run(refresh_token);
 }
 
 void FakeSigninManager::CompletePendingSignin() {
   SetAuthenticatedAccountId(GetAccountIdForAuthInProgress());
   set_auth_in_progress(std::string());
-  FOR_EACH_OBSERVER(
-      SigninManagerBase::Observer, observer_list_,
-      GoogleSigninSucceeded(authenticated_account_id_, username_, password_));
+  for (auto& observer : observer_list_) {
+    observer.GoogleSigninSucceeded(authenticated_account_id_, username_,
+                                   password_);
+  }
 }
 
 void FakeSigninManager::SignIn(const std::string& gaia_id,
                                const std::string& username,
                                const std::string& password) {
   StartSignInWithRefreshToken(std::string(), gaia_id, username, password,
                               OAuthTokenFetchedCallback());
   CompletePendingSignin();
 }
 
 void FakeSigninManager::ForceSignOut() {
   prohibit_signout_ = false;
   SignOut(signin_metrics::SIGNOUT_TEST,
           signin_metrics::SignoutDelete::IGNORE_METRIC);
 }
 
 void FakeSigninManager::FailSignin(const GoogleServiceAuthError& error) {
-  FOR_EACH_OBSERVER(SigninManagerBase::Observer, observer_list_,
-                    GoogleSigninFailed(error));
+  for (auto& observer : observer_list_)
+    observer.GoogleSigninFailed(error);
 }
 
 void FakeSigninManager::SignOut(
     signin_metrics::ProfileSignout signout_source_metric,
     signin_metrics::SignoutDelete signout_delete_metric) {
   if (IsSignoutProhibited())
     return;
   set_auth_in_progress(std::string());
   set_password(std::string());
   const std::string account_id = GetAuthenticatedAccountId();
   const std::string username = GetAuthenticatedAccountInfo().email;
   authenticated_account_id_.clear();
 
-  FOR_EACH_OBSERVER(SigninManagerBase::Observer, observer_list_,
-                    GoogleSignedOut(account_id, username));
+  for (auto& observer : observer_list_)
+    observer.GoogleSignedOut(account_id, username);
 }
 
 #endif  // !defined (OS_CHROMEOS)