Fix DCHECK, memory leak, and refactor PasswordStore to use CancelableRequest

chrome/browser/password_manager/password_store_mac.cc

 // Copyright (c) 2011 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/password_manager/password_store_mac.h"
 #include "chrome/browser/password_manager/password_store_mac_internal.h"
 
 #include <CoreServices/CoreServices.h>
 #include <set>
 #include <string>
@@ skipping 868 matching lines @@
 
 void PasswordStoreMac::GetLoginsImpl(GetLoginsRequest* request,
                                      const webkit_glue::PasswordForm& form) {
   MacKeychainPasswordFormAdapter keychain_adapter(keychain_.get());
   std::vector<PasswordForm*> keychain_forms =
       keychain_adapter.PasswordsFillingForm(form);
 
   std::vector<PasswordForm*> database_forms;
   login_metadata_db_->GetLogins(form, &database_forms);
 
-  std::vector<PasswordForm*> merged_forms;
+  std::vector<PasswordForm*>& merged_forms = request->value;
   internal_keychain_helpers::MergePasswordForms(&keychain_forms,
                                                 &database_forms,
                                                 &merged_forms);
 
   // Strip any blacklist entries out of the unused Keychain array, then take
   // all the entries that are left (which we can use as imported passwords).
   std::vector<PasswordForm*> keychain_blacklist_forms =
       internal_keychain_helpers::ExtractBlacklistForms(&keychain_forms);
   merged_forms.insert(merged_forms.end(), keychain_forms.begin(),
                       keychain_forms.end());
   keychain_forms.clear();
   STLDeleteElements(&keychain_blacklist_forms);
 
   // Clean up any orphaned database entries.
   RemoveDatabaseForms(database_forms);
   STLDeleteElements(&database_forms);
 
-  NotifyConsumer(request, merged_forms);
+  ForwardLoginsResult(request);
 }
 
 void PasswordStoreMac::GetBlacklistLoginsImpl(GetLoginsRequest* request) {
-  std::vector<PasswordForm*> database_forms;
-  FillBlacklistLogins(&database_forms);
-  NotifyConsumer(request, database_forms);
+  FillBlacklistLogins(&request->value);
+  ForwardLoginsResult(request);
 }
 
 void PasswordStoreMac::GetAutofillableLoginsImpl(GetLoginsRequest* request) {
-  std::vector<PasswordForm*> database_forms;
-  FillAutofillableLogins(&database_forms);
-  NotifyConsumer(request, database_forms);
+  FillAutofillableLogins(&request->value);
+  ForwardLoginsResult(request);
 }
 
 bool PasswordStoreMac::FillAutofillableLogins(
          std::vector<PasswordForm*>* forms) {
   DCHECK(thread_->message_loop() == MessageLoop::current());
 
   std::vector<PasswordForm*> database_forms;
   login_metadata_db_->GetAutofillableLogins(&database_forms);
 
   std::vector<PasswordForm*> merged_forms =
@@ skipping 74 matching lines @@
   owned_keychain_adapter.SetFindsOnlyOwnedItems(true);
   for (std::vector<PasswordForm*>::const_iterator i = forms.begin();
        i != forms.end(); ++i) {
     owned_keychain_adapter.RemovePassword(**i);
   }
 }
 
 void PasswordStoreMac::CreateNotificationService() {
   notification_service_.reset(new NotificationService);
 }