Explicit dependency on Inflector and Object#blank?

activesupport/lib/active_support/dependencies.rb

@@ -1,4 +1,6 @@
 require 'set'
+require 'active_support/inflector'
+require 'active_support/core_ext/object/blank'
 
 module ActiveSupport #:nodoc:
   module Dependencies #:nodoc:
@@ -412,7 +414,7 @@ module ActiveSupport #:nodoc:
       # If we have an anonymous module, all we can do is attempt to load from Object.
       from_mod = Object if from_mod.name.blank?
 
-      unless qualified_const_defined?(from_mod.name) && from_mod.name.constantize.object_id == from_mod.object_id
+      unless qualified_const_defined?(from_mod.name) && Inflector.constantize(from_mod.name).object_id == from_mod.object_id
         raise ArgumentError, "A copy of #{from_mod} has been removed from the module tree but is still active!"
       end
 
@@ -503,7 +505,7 @@ module ActiveSupport #:nodoc:
 
           # Handle the case where the module has yet to be defined.
           initial_constants = if qualified_const_defined?(mod_name)
-            mod_name.constantize.local_constant_names
+            Inflector.constantize(mod_name).local_constant_names
           else
             []
           end
@@ -528,7 +530,7 @@ module ActiveSupport #:nodoc:
           # Module still doesn't exist? Treat it as if it has no constants.
           next [] unless qualified_const_defined?(mod_name)
 
-          mod = mod_name.constantize
+          mod = Inflector.constantize(mod_name)
           next [] unless mod.is_a? Module
           new_constants = mod.local_constant_names - prior_constants
 
@@ -598,7 +600,7 @@ module ActiveSupport #:nodoc:
       if names.size == 1 # It's under Object
         parent = Object
       else
-        parent = (names[0..-2] * '::').constantize
+        parent = Inflector.constantize(names[0..-2] * '::')
       end
 
       log "removing constant #{const}"