Revert "Use freeze instead of close!"

This reverts commit 29592a7f09.

actionpack/lib/action_dispatch/middleware/cookies.rb

@@ -115,10 +115,13 @@ module ActionDispatch
         @delete_cookies = {}
         @host = host
         @secure = secure
+        @closed = false
         @cookies = {}
       end
 
-      alias :closed? :frozen?
+      attr_reader :closed
+      alias :closed? :closed
+      def close!; @closed = true end
 
       # Returns the value of the cookie by +name+, or +nil+ if no such cookie exists.
       def [](name)
@@ -327,7 +330,7 @@ module ActionDispatch
       [status, headers, body]
     ensure
       cookie_jar = ActionDispatch::Request.new(env).cookie_jar unless cookie_jar
-      cookie_jar.freeze
+      cookie_jar.close!
     end
   end
 end

actionpack/lib/action_dispatch/middleware/flash.rb

@@ -43,9 +43,12 @@ module ActionDispatch
     class FlashNow #:nodoc:
       def initialize(flash)
         @flash = flash
+        @closed = false
       end
 
-      alias :closed? :frozen?
+      attr_reader :closed
+      alias :closed? :closed
+      def close!; @closed = true end
 
       def []=(k, v)
         raise ClosedError, :flash if closed?
@@ -73,9 +76,12 @@ module ActionDispatch
       def initialize #:nodoc:
         super
         @used = Set.new
+        @closed = false
       end
 
-      alias :closed? :frozen?
+      attr_reader :closed
+      alias :closed? :closed
+      def close!; @closed = true end
 
       def []=(k, v) #:nodoc:
         raise ClosedError, :flash if closed?
@@ -194,7 +200,7 @@ module ActionDispatch
        if !flash_hash.empty? || session.key?('flash')
         session["flash"] = flash_hash
        end
-       flash_hash.freeze
+       flash_hash.close!
       end
 
       if session.key?('flash') && session['flash'].empty?

actionpack/test/dispatch/cookies_test.rb

@@ -502,16 +502,10 @@ class CookiesIntegrationTest < ActionDispatch::IntegrationTest
 
   class TestController < ActionController::Base
     def dont_set_cookies
-      # initialize lazy loaded objects
-      cookies.permanent
-      cookies.signed
       head :ok
     end
 
     def set_cookies
-      # initialize lazy loaded objects
-      cookies.permanent
-      cookies.signed
       cookies["that"] = "hello"
       head :ok
     end