rails/rails — pull request #11111 by takkanm (2013-06-26 06:21:57+00:00)
Title: fix error when only require 'active_model/naming'.

In active_model 4.0, failed to only require 'active_model/naming'.

```
irb(main):003:0> require 'active_model/naming'
NoMethodError: undefined method `delegate' for ActiveModel::Name:Class
from /Users/m_mimura/.rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/activemodel-4.0.0/lib/active_model/naming.rb:131:in `'
from /Users/m_mimura/.rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/activemodel-4.0.0/lib/active_model/naming.rb:5:in `'
from /Users/m_mimura/.rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/activemodel-4.0.0/lib/active_model/naming.rb:4:in `'
from (irb):3:in `require'
from (irb):3
from /Users/m_mimura/.rbenv/versions/2.0.0-p195/bin/irb:12:in `

'
```

So, i restore to require 'active_support/core_ext/module/delegation' and 'active_support/core_ext/object/blank'.