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

base/files/file_util_proxy_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/files/file_util_proxy.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/platform_file.h"
 #include "base/threading/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 class FileUtilProxyTest : public testing::Test {
  public:
   FileUtilProxyTest()
       : message_loop_(MessageLoop::TYPE_IO),
@@ skipping 377 matching lines @@
   char buffer[53];
   EXPECT_EQ(53, file_util::ReadFile(test_path(), buffer, 53));
   int i = 0;
   for (; i < 10; ++i)
     EXPECT_EQ(kTestData[i], buffer[i]);
   for (; i < 53; ++i)
     EXPECT_EQ(0, buffer[i]);
 }
 
 }  // namespace base