Remove all remaining traces of MessageLoopProxy.

blimp/engine/browser_tests/blimp_browser_test.cc

 // Copyright 2016 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 "blimp/engine/browser_tests/blimp_browser_test.h"
 
 #include <string>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
@@ skipping 58 matching lines @@
   return assignment;
 }
 
 void BlimpBrowserTest::SetUpOnMainThread() {
   GetEngineSession()->GetEnginePortForTesting(
       base::Bind(&BlimpBrowserTest::OnGetEnginePort, base::Unretained(this)));
   RunUntilQuit();
 }
 
 void BlimpBrowserTest::TearDownOnMainThread() {
-  content::BrowserThread::GetMessageLoopProxyForThread(
-      content::BrowserThread::UI)
+  content::BrowserThread::GetTaskRunnerForThread(content::BrowserThread::UI)
       ->PostTask(FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
 }
 
 void BlimpBrowserTest::SetUpCommandLine(base::CommandLine* command_line) {
   // Engine switches.
   blimp::engine::SetCommandLineDefaults(command_line);
 
   // Pass through the engine port if it is passed to the test.
   // Otherwise, use a dynamic port.
   if (!command_line->HasSwitch(blimp::engine::kEnginePort)) {
@@ skipping 30 matching lines @@
   run_loop_ = base::WrapUnique(new base::RunLoop());
   run_loop_->Run();
   run_loop_ = nullptr;
 }
 
 void BlimpBrowserTest::QuitRunLoop() {
   run_loop_->Quit();
 }
 
 }  // namespace blimp