Reorganize autoloads:

  * A new module (ActiveSupport::Autoload) is provide that extends
    autoloading with new behavior.
  * All autoloads in modules that have extended ActiveSupport::Autoload
    will be eagerly required in threadsafe environments
  * Autoloads can optionally leave off the path if the path is the same
    as full_constant_name.underscore
  * It is possible to specify that a group of autoloads live under an
    additional path. For instance, all of ActionDispatch's middlewares
    are ActionDispatch::MiddlewareName, but they live under 
    "action_dispatch/middlewares/middleware_name"
  * It is possible to specify that a group of autoloads are all found
    at the same path. For instance, a number of exceptions might all
    be declared there.
  * One consequence of this is that testing-related constants are not
    autoloaded. To get the testing helpers for a given component,
    require "component_name/test_case". For instance, "action_controller/test_case".
  * test_help.rb, which is automatically required by a Rails application's
    test helper, requires the test_case.rb for all active components, so
    this change will not be disruptive in existing or new applications.

1 files changed, 2 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/vendor/html-scanner.rb b/actionpack/lib/action_controller/vendor/html-scanner.rb
index f622d195ee..2cb20ddd05 100644
--- a/actionpack/lib/action_controller/vendor/html-scanner.rb
+++ b/actionpack/lib/action_controller/vendor/html-scanner.rb
@@ -1,6 +1,8 @@
 $LOAD_PATH << "#{File.dirname(__FILE__)}/html-scanner"
 
 module HTML
+  extend ActiveSupport::Autoload
+
   autoload :CDATA, 'html/node'
   autoload :Document, 'html/document'
   autoload :FullSanitizer, 'html/sanitizer'