Revert of Reland: Lazily initialize MessageLoop for faster thread startup

content/public/test/test_browser_thread.cc

 // Copyright (c) 2011 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/public/test/test_browser_thread.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/notification_service_impl.h"
@@ skipping 40 matching lines @@
     : impl_(new TestBrowserThreadImpl(identifier, message_loop)) {}
 
 TestBrowserThread::~TestBrowserThread() {
   Stop();
 }
 
 bool TestBrowserThread::Start() {
   return impl_->Start();
 }
 
-bool TestBrowserThread::StartAndWaitForTesting() {
-  return impl_->StartAndWaitForTesting();
-}
-
 bool TestBrowserThread::StartIOThread() {
   base::Thread::Options options;
   options.message_loop_type = base::MessageLoop::TYPE_IO;
   return impl_->StartWithOptions(options);
 }
 
 void TestBrowserThread::Stop() {
   impl_->Stop();
 }
 
 bool TestBrowserThread::IsRunning() {
   return impl_->IsRunning();
 }
 
 base::Thread* TestBrowserThread::DeprecatedGetThreadObject() {
   return impl_.get();
 }
 
 }  // namespace content