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

base/tools_sanity_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.
 //
 // This file contains intentional memory errors, some of which may lead to
 // crashes if the test is ran without special memory testing tools. We use these
 // errors to verify the sanity of the tools.
 
 #include "base/atomicops.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 namespace {
 
 const base::subtle::Atomic32 kMagicValue = 42;
 
@@ skipping 243 matching lines @@
 
 TEST(ToolsSanityTest, AtomicsAreIgnored) {
   base::subtle::Atomic32 shared = 0;
   ReleaseStoreThread thread1(&shared);
   AcquireLoadThread thread2(&shared);
   RunInParallel(&thread1, &thread2);
   EXPECT_EQ(kMagicValue, shared);
 }
 
 }  // namespace base