Add wallpaper experimental api framework and add a simple category list.

chrome/browser/extensions/extension_protocols.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/extension_protocols.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
@@ skipping 278 matching lines @@
     return new GeneratedBackgroundPageJob(
         request, extension, content_security_policy);
   }
 
   FilePath resources_path;
   if (PathService::Get(chrome::DIR_RESOURCES, &resources_path) &&
       (directory_path.DirName() == resources_path ||
        // Support adding chromeos specific component extension to
        // resources_path/chromeos directory. This corresponds to
        // src/chrome/browser/resources/chromeos in source tree.
-       directory_path.DirName() == resources_path.Append(
-           FILE_PATH_LITERAL("chromeos")))) {
+       directory_path.DirName() == resources_path.Append("chromeos"))) {
     FilePath relative_path;
     // Since component extension resources are included in
     // component_extension_resources.pak file, calculate extension relative
     // path against resources_path.
     resources_path.AppendRelativePath(directory_path, &relative_path);
     relative_path = relative_path.Append(
         extension_file_util::ExtensionURLToRelativeFilePath(request->url()));
     relative_path = relative_path.NormalizePathSeparators();
 
     // TODO(tc): Make a map of FilePath -> resource ids so we don't have to
@@ skipping 27 matching lines @@
                                     content_security_policy, send_cors_header);
 }
 
 }  // namespace
 
 net::URLRequestJobFactory::ProtocolHandler* CreateExtensionProtocolHandler(
     bool is_incognito,
     ExtensionInfoMap* extension_info_map) {
   return new ExtensionProtocolHandler(is_incognito, extension_info_map);
 }