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

chrome/browser/chromeos/login/signin/oauth2_login_manager.cc

 // Copyright 2014 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/chromeos/login/signin/oauth2_login_manager.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 180 matching lines @@
       this);
 }
 
 void OAuth2LoginManager::UpdateCredentials(const std::string& account_id) {
   DCHECK(!account_id.empty());
   DCHECK(!refresh_token_.empty());
   // |account_id| is assumed to be already canonicalized if it's an email.
   GetTokenService()->UpdateCredentials(account_id, refresh_token_);
   FireRefreshTokensLoaded();
 
-  FOR_EACH_OBSERVER(Observer, observer_list_,
-                    OnNewRefreshTokenAvaiable(user_profile_));
+  for (auto& observer : observer_list_)
+    observer.OnNewRefreshTokenAvaiable(user_profile_);
 }
 
 void OAuth2LoginManager::FireRefreshTokensLoaded() {
   // TODO(570218): Figure out the right way to plumb this.
   GetTokenService()->LoadCredentials(std::string());
 }
 
 void OAuth2LoginManager::OnRefreshTokenResponse(
     const std::string& access_token,
     int expires_in_seconds) {
@@ skipping 196 matching lines @@
 
   state_ = state;
   if (state == OAuth2LoginManager::SESSION_RESTORE_FAILED) {
     UMA_HISTOGRAM_TIMES("OAuth2Login.SessionRestoreTimeToFailure",
                         base::Time::Now() - session_restore_start_);
   } else if (state == OAuth2LoginManager::SESSION_RESTORE_DONE) {
     UMA_HISTOGRAM_TIMES("OAuth2Login.SessionRestoreTimeToSuccess",
                         base::Time::Now() - session_restore_start_);
   }
 
-  FOR_EACH_OBSERVER(Observer, observer_list_,
-                    OnSessionRestoreStateChanged(user_profile_, state_));
+  for (auto& observer : observer_list_)
+    observer.OnSessionRestoreStateChanged(user_profile_, state_);
 }
 
 void OAuth2LoginManager::SetSessionRestoreStartForTesting(
     const base::Time& time) {
   session_restore_start_ = time;
 }
 
 }  // namespace chromeos