Remove BrowserThread::UnsafeGetMessageLoopForThread()

chrome/browser/printing/cloud_print/test/cloud_print_proxy_process_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.
 
 // Create a service process that uses a Mock to respond to the browser in order
 // to test launching the browser using the cloud print policy check command
 // line switch.
 
 #include <stdint.h>
 
@@ skipping 502 matching lines @@
   cl.AppendSwitchNative(kProcessChannelID, startup_channel_handle_.name);
 #if defined(OS_MACOSX)
   cl.AppendSwitchASCII(kTestExecutablePath, executable_path_.value());
 #endif
   return cl;
 }
 
 TEST_F(CloudPrintProxyPolicyStartupTest, StartAndShutdown) {
   mojo::edk::Init();
   mojo::edk::ScopedIPCSupport ipc_support(
-      BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::IO)
-          ->task_runner());
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
 
   TestingBrowserProcess* browser_process =
       TestingBrowserProcess::GetGlobal();
   TestingProfileManager profile_manager(browser_process);
   ASSERT_TRUE(profile_manager.SetUp());
 
   // Must be created after the TestingProfileManager since that creates the
   // LocalState for the BrowserProcess.  Must be created before profiles are
   // constructed.
   chrome::TestingIOThreadState testing_io_thread_state;
 
   base::Process process =
       Launch("CloudPrintMockService_StartEnabledWaitForQuit");
   WaitForConnect();
   ShutdownAndWaitForExitWithTimeout(std::move(process));
   ServiceProcessControl::GetInstance()->Disconnect();
   content::RunAllPendingInMessageLoop();
 }