Revert 115997 - Replace MessageLoop::DeleteSoon implementation with one that uses base::Bind.

net/url_request/url_request_context_getter.h

 // 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.
 
 #ifndef CHROME_COMMON_NET_URL_REQUEST_CONTEXT_GETTER_H_
 #define CHROME_COMMON_NET_URL_REQUEST_CONTEXT_GETTER_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
-#include "base/message_loop_helpers.h"
+#include "base/task.h"
 #include "net/base/net_export.h"
 
 namespace base {
 class MessageLoopProxy;
 }
 
 namespace net {
 class CookieStore;
 class URLRequestContext;
 
@@ skipping 12 matching lines @@
 
   // Returns a MessageLoopProxy corresponding to the thread on which the
   // request IO happens (the thread on which the returned net::URLRequestContext
   // may be used).
   virtual scoped_refptr<base::MessageLoopProxy>
       GetIOMessageLoopProxy() const = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<URLRequestContextGetter,
                                           URLRequestContextGetterTraits>;
-  friend class base::DeleteHelper<URLRequestContextGetter>;
+  friend class DeleteTask<const URLRequestContextGetter>;
   friend struct URLRequestContextGetterTraits;
 
   URLRequestContextGetter();
   virtual ~URLRequestContextGetter();
 
  private:
   // OnDestruct is meant to ensure deletion on the thread on which the request
   // IO happens.
   void OnDestruct() const;
 };
 
 struct URLRequestContextGetterTraits {
   static void Destruct(const URLRequestContextGetter* context_getter) {
     context_getter->OnDestruct();
   }
 };
 
 }  // namespace net
 
 #endif  // CHROME_COMMON_NET_URL_REQUEST_CONTEXT_GETTER_H_