Fix chrome.identity.onSignInChanged regression for sign-outs

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 <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 201 matching lines @@
 BrowserContextKeyedAPIFactory<IdentityAPI>* IdentityAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 void IdentityAPI::OnAccountAdded(const AccountIds& ids) {}
 
 void IdentityAPI::OnAccountRemoved(const AccountIds& ids) {}
 
 void IdentityAPI::OnAccountSignInChanged(const AccountIds& ids,
                                          bool is_signed_in) {
-  const std::string primary_account_id = GetPrimaryAccountId(browser_context_);
-  if (primary_account_id != ids.account_key &&
-      !switches::IsExtensionsMultiAccount()) {
-    return;
-  }
-
   api::identity::AccountInfo account_info;
   account_info.id = ids.gaia;
 
   scoped_ptr<base::ListValue> args =
       api::identity::OnSignInChanged::Create(account_info, is_signed_in);
   scoped_ptr<Event> event(new Event(api::identity::OnSignInChanged::kEventName,
                                     args.Pass(),
                                     browser_context_));
 
   EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
@@ skipping 635 matching lines @@
 void IdentityLaunchWebAuthFlowFunction::OnAuthFlowURLChange(
     const GURL& redirect_url) {
   if (redirect_url.GetWithEmptyPath() == final_url_prefix_) {
     SetResult(new base::StringValue(redirect_url.spec()));
     SendResponse(true);
     Release();  // Balanced in RunAsync.
   }
 }
 
 }  // namespace extensions