Partially revert deprecation of *_filter

We are going to deprecate only on Rails 5 to make easier plugin
maintainers support different Rails versions. Right now we are only
discouraging their usage.

This reverts commit 6c5f43bab8.

Conflicts:
	actionpack/CHANGELOG.md

actionpack/CHANGELOG.md

@@ -2,10 +2,6 @@
     application.  Use of a symbol should be replaced with `action: symbol`.
     Use of a string without a "#" should be replaced with `controller: string`.
 
-*   Deprecate all *_filter callbacks in favor of *_action callbacks.
-
-    *Rafael Mendonça França*
-
 *   Fix URL generation with `:trailing_slash` such that it does not add
     a trailing slash after `.:format`
 

actionpack/lib/abstract_controller/callbacks.rb

@@ -1,5 +1,3 @@
-require 'active_support/deprecation'
-
 module AbstractController
   module Callbacks
     extend ActiveSupport::Concern
@@ -56,11 +54,7 @@ module AbstractController
         skip_after_action(*names)
         skip_around_action(*names)
       end
-
-      def skip_filter(*names)
-        ActiveSupport::Deprecation.warn("#{callback}_filter is deprecated and will removed in Rails 5. Use #{callback}_action instead.")
-        skip_action_callback(*names)
-      end
+      alias_method :skip_filter, :skip_action_callback
 
       # Take callback names and an optional callback proc, normalize them,
       # then call the block with each callback. This allows us to abstract
@@ -175,22 +169,14 @@ module AbstractController
             set_callback(:process_action, callback, name, options)
           end
         end
-
-        define_method "#{callback}_filter" do |*names, &blk|
-          ActiveSupport::Deprecation.warn("#{callback}_filter is deprecated and will removed in Rails 5. Use #{callback}_action instead.")
-          send("#{callback}_action", *names, &blk)
-        end
+        alias_method :"#{callback}_filter", :"#{callback}_action"
 
         define_method "prepend_#{callback}_action" do |*names, &blk|
           _insert_callbacks(names, blk) do |name, options|
             set_callback(:process_action, callback, name, options.merge(:prepend => true))
           end
         end
-
-        define_method "prepend_#{callback}_filter" do |*names, &blk|
-          ActiveSupport::Deprecation.warn("prepend_#{callback}_filter is deprecated and will removed in Rails 5. Use prepend_#{callback}_action instead.")
-          send("prepend_#{callback}_action", *names, &blk)
-        end
+        alias_method :"prepend_#{callback}_filter", :"prepend_#{callback}_action"
 
         # Skip a before, after or around callback. See _insert_callbacks
         # for details on the allowed parameters.
@@ -199,18 +185,11 @@ module AbstractController
             skip_callback(:process_action, callback, name, options)
           end
         end
-
-        define_method "skip_#{callback}_filter" do |*names, &blk|
-          ActiveSupport::Deprecation.warn("skip_#{callback}_filter is deprecated and will removed in Rails 5. Use skip_#{callback}_action instead.")
-          send("skip_#{callback}_action", *names, &blk)
-        end
+        alias_method :"skip_#{callback}_filter", :"skip_#{callback}_action"
 
         # *_action is the same as append_*_action
-        alias_method :"append_#{callback}_action", :"#{callback}_action"  # alias_method :append_before_action, :before_action
-        define_method "append_#{callback}_filter" do |*names, &blk|
-          ActiveSupport::Deprecation.warn("append_#{callback}_filter is deprecated and will removed in Rails 5. Use append_#{callback}_action instead.")
-          send("append_#{callback}_action", *names, &blk)
-        end
+        alias_method :"append_#{callback}_action", :"#{callback}_action"
+        alias_method :"append_#{callback}_filter", :"#{callback}_action"
       end
     end
   end

actionpack/test/abstract/callbacks_test.rb

@@ -267,11 +267,9 @@ module AbstractController
     end
 
     class AliasedCallbacks < ControllerWithCallbacks
-      ActiveSupport::Deprecation.silence do
-        before_filter :first
-        after_filter :second
-        around_filter :aroundz
-      end
+      before_filter :first
+      after_filter :second
+      around_filter :aroundz
 
       def first
         @text = "Hello world"