Downloads: replace BrowserThread::FILE with task scheduler.

content/browser/download/mhtml_generation_browsertest.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 <stdint.h>
 #include <memory>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/histogram_tester.h"
 #include "base/threading/thread_restrictions.h"
+#include "content/browser/download/download_task_runner.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/public/browser/mhtml_extra_parts.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/mhtml_generation_params.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
@@ skipping 301 matching lines @@
       BrowserThread::PostTask(
           BrowserThread::UI, FROM_HERE, base::Bind(
               &GenerateMHTMLAndExitRendererMessageFilter::TaskX,
               base::Unretained(this)));
     }
 
     return false;
   };
 
   void TaskX() {
-    BrowserThread::PostTask(
-        BrowserThread::FILE, FROM_HERE, base::Bind(
-            &GenerateMHTMLAndExitRendererMessageFilter::TaskY,
-            base::Unretained(this)));
+    GetDownloadTaskRunner()->PostTask(
+        FROM_HERE, base::Bind(&GenerateMHTMLAndExitRendererMessageFilter::TaskY,
+                              base::Unretained(this)));
   }
 
   void TaskY() {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE, base::Bind(
             &GenerateMHTMLAndExitRendererMessageFilter::TaskZ,
             base::Unretained(this)));
   }
 
   void TaskZ() {
@@ skipping 365 matching lines @@
     base::ThreadRestrictions::ScopedAllowIO allow_io_for_content_verification;
     ASSERT_TRUE(base::ReadFileToString(path, &mhtml));
   }
 
   // Make sure that both extra data parts made it into the mhtml.
   EXPECT_THAT(mhtml, HasSubstr(kFakeSignalData1));
   EXPECT_THAT(mhtml, HasSubstr(kFakeSignalData2));
 }
 
 }  // namespace content