Use a direct include of the message_loop header in webkit/, part 1.

webkit/browser/fileapi/sandbox_file_system_backend_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 "webkit/browser/fileapi/sandbox_file_system_backend.h"
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 #include "webkit/browser/fileapi/file_system_backend.h"
 #include "webkit/browser/fileapi/file_system_url.h"
 #include "webkit/browser/fileapi/mock_file_system_options.h"
 #include "webkit/browser/fileapi/sandbox_context.h"
 #include "webkit/common/fileapi/file_system_util.h"
 
 // PS stands for path separator.
@@ skipping 327 matching lines @@
                             OPEN_FILE_SYSTEM_CREATE_IF_NONEXISTENT,
                             &root_path));
     base::FilePath expected = file_system_path().AppendASCII(
         kRootPathFileURITestCases[i].expected_path);
     EXPECT_EQ(expected.value(), root_path.value());
     EXPECT_TRUE(base::DirectoryExists(root_path));
   }
 }
 
 }  // namespace fileapi