Use a direct include of the message_loop header in base/.

base/threading/thread_unittest.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.
 
 #include "base/threading/thread.h"
 
 #include <vector>
 
 #include "base/bind.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 using base::Thread;
 
 typedef PlatformTest ThreadTest;
 
 namespace {
 
@@ skipping 209 matching lines @@
 
     // Upon leaving this scope, the thread is deleted.
   }
 
   // Check the order of events during shutdown.
   ASSERT_EQ(static_cast<size_t>(THREAD_NUM_EVENTS), captured_events.size());
   EXPECT_EQ(THREAD_EVENT_INIT, captured_events[0]);
   EXPECT_EQ(THREAD_EVENT_CLEANUP, captured_events[1]);
   EXPECT_EQ(THREAD_EVENT_MESSAGE_LOOP_DESTROYED, captured_events[2]);
 }