Move ExtensionPrefs and friends to extensions/ directory.

chrome/browser/extensions/api/file_handlers/app_file_handler_util.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 "chrome/browser/extensions/api/file_handlers/app_file_handler_util.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
-#include "chrome/browser/extensions/extension_prefs.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/render_process_host.h"
+#include "extensions/browser/extension_prefs.h"
 #include "net/base/mime_util.h"
 #include "webkit/browser/fileapi/isolated_context.h"
 #include "webkit/common/fileapi/file_system_mount_option.h"
 #include "webkit/common/fileapi/file_system_types.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #endif
 
 namespace extensions {
@@ skipping 385 matching lines @@
     *error = kInvalidParameters;
     return false;
   }
 
   return true;
 }
 
 }  // namespace app_file_handler_util
 
 }  // namespace extensions