Remove more instances of BrowserThread::FILE.

content/shell/browser/layout_test/layout_test_browser_context.cc

 // 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.
 
 #include "content/shell/browser/layout_test/layout_test_browser_context.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 79 matching lines @@
 
 ShellURLRequestContextGetter*
 LayoutTestBrowserContext::CreateURLRequestContextGetter(
     ProtocolHandlerMap* protocol_handlers,
     URLRequestInterceptorScopedVector request_interceptors) {
   protocol_handlers->insert(std::make_pair(
       "layout-test-mojom", make_linked_ptr(new MojomProtocolHandler)));
   return new LayoutTestURLRequestContextGetter(
       ignore_certificate_errors(), GetPath(),
       BrowserThread::GetTaskRunnerForThread(BrowserThread::IO),
-      BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
       protocol_handlers, std::move(request_interceptors), net_log());
 }
 
 DownloadManagerDelegate*
 LayoutTestBrowserContext::GetDownloadManagerDelegate() {
   if (!download_manager_delegate_) {
     download_manager_delegate_.reset(new LayoutTestDownloadManagerDelegate());
     download_manager_delegate_->SetDownloadManager(
         BrowserContext::GetDownloadManager(this));
     download_manager_delegate_->SetDownloadBehaviorForTesting(
@@ skipping 21 matching lines @@
     background_sync_controller_.reset(new MockBackgroundSyncController());
   return background_sync_controller_.get();
 }
 
 LayoutTestPermissionManager*
 LayoutTestBrowserContext::GetLayoutTestPermissionManager() {
   return static_cast<LayoutTestPermissionManager*>(GetPermissionManager());
 }
 
 }  // namespace content