Revert const_missing bypass in favor of Duration constant lookup tweak

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8412 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

 *SVN*
 
+* Ruby 1.9 compatibility.  #1689, #10466, #10468 [Cheah Chu Yeow, Jeremy Kemper]
+
 * TimeZone#to_s uses UTC rather than GMT.  #1689 [Cheah Chu Yeow]
 
 * Refactor of Hash#symbolize_keys! to use Hash#replace.  Closes #10420 [ReinH]

activesupport/lib/active_support/dependencies.rb

@@ -461,11 +461,6 @@ def unloadable(const_desc = self)
 
 class Class
   def const_missing(const_name)
-    # Bypass entire lookup process if we can get the constant from Object.
-    # This is useful for Ruby 1.9 where Module#const_defined? looks up the
-    # ancestors in the chain for the constant.
-    return ::Object.const_get(const_name) if ::Object.const_defined?(const_name)
-
     if [Object, Kernel].include?(self) || parent == self
       super
     else

activesupport/lib/active_support/duration.rb

@@ -64,7 +64,7 @@ def ago(time = ::Time.now)
     alias :until :ago
 
     def inspect #:nodoc:
-      consolidated = parts.inject(Hash.new(0)) { |h,part| h[part.first] += part.last; h }
+      consolidated = parts.inject(::Hash.new(0)) { |h,part| h[part.first] += part.last; h }
       [:years, :months, :days, :minutes, :seconds].map do |length|
         n = consolidated[length]
         "#{n} #{n == 1 ? length.to_s.singularize : length.to_s}" if n.nonzero?