Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/download/drag_download_file.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 "content/browser/download/drag_download_file.h"
 
 #include "base/bind.h"
 #include "base/files/file.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
+#include "base/message_loop/message_loop.h"
 #include "content/browser/download/download_stats.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_save_info.h"
 #include "content/public/browser/download_url_parameters.h"
 
 namespace content {
 
@@ skipping 67 matching lines @@
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     if (download_item_)
       download_item_->RemoveObserver(this);
   }
 
   void OnDownloadStarted(DownloadItem* item,
                          DownloadInterruptReason interrupt_reason) {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     if (!item) {
       DCHECK_NE(DOWNLOAD_INTERRUPT_REASON_NONE, interrupt_reason);
-      on_completed_loop_->task_runner()->PostTask(
-          FROM_HERE, base::Bind(on_completed_, false));
+      on_completed_loop_->PostTask(FROM_HERE, base::Bind(on_completed_, false));
       return;
     }
     DCHECK_EQ(DOWNLOAD_INTERRUPT_REASON_NONE, interrupt_reason);
     download_item_ = item;
     download_item_->AddObserver(this);
   }
 
   // DownloadItem::Observer:
   void OnDownloadUpdated(DownloadItem* item) override {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     DCHECK_EQ(download_item_, item);
     DownloadItem::DownloadState state = download_item_->GetState();
     if (state == DownloadItem::COMPLETE ||
         state == DownloadItem::CANCELLED ||
         state == DownloadItem::INTERRUPTED) {
       if (!on_completed_.is_null()) {
-        on_completed_loop_->task_runner()->PostTask(
-            FROM_HERE,
-            base::Bind(on_completed_, state == DownloadItem::COMPLETE));
+        on_completed_loop_->PostTask(FROM_HERE, base::Bind(
+            on_completed_, state == DownloadItem::COMPLETE));
         on_completed_.Reset();
       }
       download_item_->RemoveObserver(this);
       download_item_ = NULL;
     }
     // Ignore other states.
   }
 
   void OnDownloadDestroyed(DownloadItem* item) override {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     DCHECK_EQ(download_item_, item);
     if (!on_completed_.is_null()) {
       const bool is_complete =
           download_item_->GetState() == DownloadItem::COMPLETE;
-      on_completed_loop_->task_runner()->PostTask(
-          FROM_HERE, base::Bind(on_completed_, is_complete));
+      on_completed_loop_->PostTask(FROM_HERE, base::Bind(
+          on_completed_, is_complete));
       on_completed_.Reset();
     }
     download_item_->RemoveObserver(this);
     download_item_ = NULL;
   }
 
   base::MessageLoop* on_completed_loop_;
   OnCompleted on_completed_;
   GURL url_;
   Referrer referrer_;
@@ skipping 92 matching lines @@
 
 void DragDownloadFile::CheckThread() {
 #if defined(OS_WIN)
   DCHECK(drag_message_loop_ == base::MessageLoop::current());
 #else
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 #endif
 }
 
 }  // namespace content