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

base/synchronization/waitable_event_watcher_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/synchronization/waitable_event_watcher.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 namespace {
 
 // The message loops on which each waitable event timer should be tested.
@@ skipping 147 matching lines @@
 #else
 #define MAYBE_DeleteUnder DeleteUnder
 #endif
 TEST(WaitableEventWatcherTest, MAYBE_DeleteUnder) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
     RunTest_DeleteUnder(testing_message_loops[i]);
   }
 }
 
 }  // namespace base