Eliminate BrowserThread usage from PasswordStoreDefault.

chrome/browser/password_manager/password_store.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/password_manager/password_store.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 135 matching lines @@
   observers_.AddObserver(observer);
 }
 
 void PasswordStore::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 PasswordStore::~PasswordStore() {}
 
 bool PasswordStore::ScheduleTask(const base::Closure& task) {
-  scoped_refptr<base::SequencedTaskRunner> task_runner(
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner(
       GetBackgroundTaskRunner());
   if (task_runner.get())
     return task_runner->PostTask(FROM_HERE, task);
   return false;
 }
 
-scoped_refptr<base::SequencedTaskRunner>
+scoped_refptr<base::SingleThreadTaskRunner>
 PasswordStore::GetBackgroundTaskRunner() {
   return db_thread_runner_;
 }
 
 void PasswordStore::ForwardLoginsResult(GetLoginsRequest* request) {
   request->ApplyIgnoreLoginsCutoff();
   request->ForwardResult();
 }
 
 void PasswordStore::CopyAndForwardLoginsResult(
@@ skipping 29 matching lines @@
 void PasswordStore::PostNotifyLoginsChanged() {
   main_thread_runner_->PostTask(
       FROM_HERE,
       base::Bind(&PasswordStore::NotifyLoginsChanged, this));
 }
 
 void PasswordStore::NotifyLoginsChanged() {
   DCHECK(main_thread_runner_->BelongsToCurrentThread());
   FOR_EACH_OBSERVER(Observer, observers_, OnLoginsChanged());
 }