Add ActionView::ModelNaming

It's just a duplicate of ActionController::ModelNaming. These are just a
simple helpers for decoupling Active Model, so it does not make sense to
extract it to Active Support, but the point is to decouple also Action
View and Action Pack

actionpack/lib/action_view/helpers/form_helper.rb

@@ -4,12 +4,12 @@ require 'action_view/helpers/tag_helper'
 require 'action_view/helpers/form_tag_helper'
 require 'action_view/helpers/active_model_helper'
 require 'action_view/helpers/tags'
+require 'action_view/model_naming'
 require 'active_support/core_ext/class/attribute_accessors'
 require 'active_support/core_ext/hash/slice'
 require 'active_support/core_ext/string/output_safety'
 require 'active_support/core_ext/array/extract_options'
 require 'active_support/core_ext/string/inflections'
-require 'action_controller/model_naming'
 
 module ActionView
   # = Action View Form Helpers
@@ -115,7 +115,7 @@ module ActionView
 
       include FormTagHelper
       include UrlHelper
-      include ActionController::ModelNaming
+      include ModelNaming
 
       # Creates a form that allows the user to create or update the attributes
       # of a specific model object.
@@ -1156,7 +1156,7 @@ module ActionView
     end
 
     class FormBuilder
-      include ActionController::ModelNaming
+      include ModelNaming
 
       # The methods which wrap a form helper call.
       class_attribute :field_helpers

actionpack/lib/action_view/model_naming.rb

@@ -0,0 +1,12 @@
+module ActionView
+  module ModelNaming
+    # Converts the given object to an ActiveModel compliant one.
+    def convert_to_model(object)
+      object.respond_to?(:to_model) ? object.to_model : object
+    end
+
+    def model_name_from_record_or_class(record_or_class)
+      (record_or_class.is_a?(Class) ? record_or_class : convert_to_model(record_or_class).class).model_name
+    end
+  end
+end

actionpack/lib/action_view/record_identifier.rb

@@ -1,5 +1,5 @@
 require 'active_support/core_ext/module'
-require 'action_controller/model_naming'
+require 'action_view/model_naming'
 
 module ActionView
   # The record identifier encapsulates a number of naming conventions for dealing with records, like Active Records or