Move the download code to new directories:

chrome/browser/download/download_exe.cc

 // Copyright (c) 2006-2008 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 <set>
 #include <string>
 
-#include "chrome/browser/download_util.h"
+#include "chrome/browser/download/download_util.h"
 
 namespace download_util {
 
 // For file extensions taken from mozilla:
 
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
@@ skipping 109 matching lines @@
 };
 
 void InitializeExeTypes(std::set<std::wstring>* exe_extensions) {
   DCHECK(exe_extensions);
   for (size_t i = 0; i < arraysize(g_executables); ++i)
     exe_extensions->insert(g_executables[i]);
 }
 
 }  // namespace download_util