Move PrefMember and PrefChangeRegistrar to api directory.

chrome/browser/download/download_prefs.h

 // 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.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_PREFS_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_PREFS_H_
 
 #include <set>
 
 #include "base/file_path.h"
-#include "chrome/browser/prefs/pref_member.h"
+#include "chrome/browser/api/prefs/pref_member.h"
 
 class Profile;
 
 namespace content {
 class BrowserContext;
 class DownloadManager;
 }
 
 // Stores all download-related preferences.
 class DownloadPrefs {
@@ skipping 51 matching lines @@
     bool operator()(const FilePath::StringType& a,
                     const FilePath::StringType& b) const;
   };
   typedef std::set<FilePath::StringType, AutoOpenCompareFunctor> AutoOpenSet;
   AutoOpenSet auto_open_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadPrefs);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_PREFS_H_