Remove usage of FOR_EACH_OBSERVER macro in components/signin

components/signin/core/browser/signin_manager_base.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 "components/signin/core/browser/signin_manager_base.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 232 matching lines @@
 }
 
 void SigninManagerBase::RemoveSigninDiagnosticsObserver(
     SigninDiagnosticsObserver* observer) {
   signin_diagnostics_observers_.RemoveObserver(observer);
 }
 
 void SigninManagerBase::NotifyDiagnosticsObservers(
     const TimedSigninStatusField& field,
     const std::string& value) {
-  FOR_EACH_OBSERVER(SigninDiagnosticsObserver,
-                    signin_diagnostics_observers_,
-                    NotifySigninValueChanged(field, value));
+  for (auto& observer : signin_diagnostics_observers_)
+    observer.NotifySigninValueChanged(field, value);
 }