Check for ActionMailer and ActionController before attempting to eager load their view paths

Signed-off-by: NJoshua Peek <josh@joshpeek.com>

railties/lib/initializer.rb

@@ -341,8 +341,8 @@ def load_observers
 
     def load_view_paths
       ActionView::PathSet::Path.eager_load_templates! if configuration.cache_classes
-      ActionMailer::Base.template_root.load
-      ActionController::Base.view_paths.load
+      ActionMailer::Base.template_root.load if configuration.frameworks.include?(:action_mailer)
+      ActionController::Base.view_paths.load if configuration.frameworks.include?(:action_controller)
     end
 
     # Eager load application classes

railties/test/initializer_test.rb

@@ -136,8 +136,27 @@ def test_unknown_framework_raises_error
       end
     end
 
-    protected
+    def test_action_mailer_load_paths_set_only_if_action_mailer_in_use
+      @config.frameworks = [:action_controller]
+      initializer = Rails::Initializer.new @config
+      initializer.send :require_frameworks
+
+      assert_nothing_raised NameError do
+        initializer.send :load_view_paths
+      end
+    end
 
+    def test_action_controller_load_paths_set_only_if_action_controller_in_use
+      @config.frameworks = []
+      initializer = Rails::Initializer.new @config
+      initializer.send :require_frameworks
+
+      assert_nothing_raised NameError do
+        initializer.send :load_view_paths
+      end
+    end
+
+    protected
       def assert_framework_path(path)
         assert @config.framework_paths.include?(path),
           "<#{path.inspect}> not found among <#{@config.framework_paths.inspect}>"