Revert "Merge pull request #43 from rubys/rails_issues_9461"

This reverts commit ccf92ee, reversing
changes made to 8105eb9.

Reason: Helper module should be included into AV::Base, extending it with
the helpers and config options.

Author: carlosantoniodasilva

lib/sprockets/railtie.rb

@@ -81,24 +81,26 @@ def configure(&block)
         app.assets.append_path path
       end
 
-      include Sprockets::Rails::Helper
-
-      # Copy relevant config to AV context
-      self.debug_assets  = config.assets.debug
-      self.digest_assets = config.assets.digest
-      self.assets_prefix = config.assets.prefix
-
-      # Copy over to Sprockets as well
-      context = app.assets.context_class
-      context.assets_prefix = config.assets.prefix
-      context.digest_assets = config.assets.digest
-      context.config        = config.action_controller
-
-      if config.assets.compile
-        self.assets_environment = app.assets
-        self.assets_manifest    = Sprockets::Manifest.new(app.assets, manifest_path)
-      else
-        self.assets_manifest = Sprockets::Manifest.new(manifest_path)
+      ActiveSupport.on_load(:action_view) do
+        include Sprockets::Rails::Helper
+
+        # Copy relevant config to AV context
+        self.debug_assets  = config.assets.debug
+        self.digest_assets = config.assets.digest
+        self.assets_prefix = config.assets.prefix
+
+        # Copy over to Sprockets as well
+        context = app.assets.context_class
+        context.assets_prefix = config.assets.prefix
+        context.digest_assets = config.assets.digest
+        context.config        = config.action_controller
+
+        if config.assets.compile
+          self.assets_environment = app.assets
+          self.assets_manifest    = Sprockets::Manifest.new(app.assets, manifest_path)
+        else
+          self.assets_manifest = Sprockets::Manifest.new(manifest_path)
+        end
       end
 
       app.assets.js_compressor  = config.assets.js_compressor