components: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

components/signin/core/browser/signin_manager_cookie_helper.h

 // 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.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_MANAGER_COOKIE_HELPER_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_MANAGER_COOKIE_HELPER_H_
 
 #include "base/callback_helpers.h"
 #include "base/memory/ref_counted.h"
 #include "net/cookies/canonical_cookie.h"
 #include "net/url_request/url_request_context_getter.h"
 
 namespace base {
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 // This class fetches GAIA cookie on IO thread on behalf of SigninManager which
 // only lives on the UI thread.
 class SigninManagerCookieHelper
     : public base::RefCountedThreadSafe<SigninManagerCookieHelper> {
  public:
   explicit SigninManagerCookieHelper(
       net::URLRequestContextGetter* request_context_getter,
-      scoped_refptr<base::MessageLoopProxy> ui_thread,
-      scoped_refptr<base::MessageLoopProxy> io_thread);
+      scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
+      scoped_refptr<base::SingleThreadTaskRunner> io_thread);
 
   // Starts fetching gaia cookies, which will notify its completion via
   // callback.
   void StartFetchingGaiaCookiesOnUIThread(
       const base::Callback<void(const net::CookieList& cookies)>& callback);
 
   // Starts fetching cookies for the given URL. This must be called on
   // |ui_thread_|.
   void StartFetchingCookiesOnUIThread(
       const GURL& url,
       const base::Callback<void(const net::CookieList& cookies)>& callback);
 
  private:
   friend class base::RefCountedThreadSafe<SigninManagerCookieHelper>;
   ~SigninManagerCookieHelper();
 
   // Fetch cookies for the given URL. This must be called on |io_thread_|.
   void FetchCookiesOnIOThread(const GURL& url);
 
   // Callback for fetching cookies. This must be called on |io_thread_|.
   void OnCookiesFetched(const net::CookieList& cookies);
 
   // Notifies the completion callback. This must be called on |ui_thread_|.
   void NotifyOnUIThread(const net::CookieList& cookies);
 
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   // This only mutates on |ui_thread_|.
   base::Callback<void(const net::CookieList& cookies)> completion_callback_;
 
-  // The MessageLoopProxy that this class uses as its UI thread.
-  scoped_refptr<base::MessageLoopProxy> ui_thread_;
-  // The MessageLoopProxy that this class uses as its IO thread.
-  scoped_refptr<base::MessageLoopProxy> io_thread_;
+  // The task runner that this class uses as its UI thread.
+  scoped_refptr<base::SingleThreadTaskRunner> ui_thread_;
+  // The task runner that this class uses as its IO thread.
+  scoped_refptr<base::SingleThreadTaskRunner> io_thread_;
   DISALLOW_COPY_AND_ASSIGN(SigninManagerCookieHelper);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_MANAGER_COOKIE_HELPER_H_