Remove all remaining traces of MessageLoopProxy.

content/shell/browser/shell_browser_context.cc

 // Copyright 2013 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/shell_browser_context.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 114 matching lines @@
 
   return download_manager_delegate_.get();
 }
 
 ShellURLRequestContextGetter*
 ShellBrowserContext::CreateURLRequestContextGetter(
     ProtocolHandlerMap* protocol_handlers,
     URLRequestInterceptorScopedVector request_interceptors) {
   return new ShellURLRequestContextGetter(
       ignore_certificate_errors_, GetPath(),
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO),
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO),
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
       protocol_handlers, std::move(request_interceptors), net_log_);
 }
 
 net::URLRequestContextGetter* ShellBrowserContext::CreateRequestContext(
     ProtocolHandlerMap* protocol_handlers,
     URLRequestInterceptorScopedVector request_interceptors) {
   DCHECK(!url_request_getter_.get());
   url_request_getter_ = CreateURLRequestContextGetter(
       protocol_handlers, std::move(request_interceptors));
   resource_context_->set_url_request_context_getter(url_request_getter_.get());
@@ skipping 48 matching lines @@
   return permission_manager_.get();
 }
 
 BackgroundSyncController* ShellBrowserContext::GetBackgroundSyncController() {
   if (!background_sync_controller_)
     background_sync_controller_.reset(new MockBackgroundSyncController());
   return background_sync_controller_.get();
 }
 
 }  // namespace content