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

net/disk_cache/file_win.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 "net/disk_cache/file.h"
 
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/disk_cache.h"
 
 namespace {
 
 // Structure used for asynchronous operations.
 struct MyOverlapped {
   MyOverlapped(disk_cache::File* file, size_t offset,
                disk_cache::FileIOCallback* callback);
   ~MyOverlapped() {}
@@ skipping 246 matching lines @@
     base::MessageLoopForIO::current()->WaitForIOCompletion(100, handler);
   }
 }
 
 // Static.
 void File::DropPendingIO() {
   // Nothing to do here.
 }
 
 }  // namespace disk_cache