Remove FOR_EACH_OBSERVER macro usage in chrome/browser/extensions

chrome/browser/extensions/api/identity/identity_api.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 "chrome/browser/extensions/api/identity/identity_api.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
@@ skipping 207 matching lines @@
   }
 
   return gaia_ids;
 }
 
 std::string IdentityAPI::FindAccountKeyByGaiaId(const std::string& gaia_id) {
   return account_tracker_.FindAccountIdsByGaiaId(gaia_id).account_key;
 }
 
 void IdentityAPI::Shutdown() {
-  FOR_EACH_OBSERVER(ShutdownObserver, shutdown_observer_list_, OnShutdown());
+  for (auto& observer : shutdown_observer_list_)
+    observer.OnShutdown();
   account_tracker_.RemoveObserver(this);
   account_tracker_.Shutdown();
 }
 
 static base::LazyInstance<BrowserContextKeyedAPIFactory<IdentityAPI> >
     g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 BrowserContextKeyedAPIFactory<IdentityAPI>* IdentityAPI::GetFactoryInstance() {
   return g_factory.Pointer();
@@ skipping 776 matching lines @@
   if (redirect_url.GetWithEmptyPath() == final_url_prefix_) {
     SetResult(base::MakeUnique<base::StringValue>(redirect_url.spec()));
     SendResponse(true);
     if (auth_flow_)
       auth_flow_.release()->DetachDelegateAndDelete();
     Release();  // Balanced in RunAsync.
   }
 }
 
 }  // namespace extensions