Fixed that BenchmarkHelper should use controller.logger instead of @l…

…ogger (which now apparently is gone)

actionpack/lib/action_view/helpers/benchmark_helper.rb

@@ -21,11 +21,13 @@ module BenchmarkHelper
       # You may give an optional logger level as the second argument
       # (:debug, :info, :warn, :error); the default value is :info.
       def benchmark(message = "Benchmarking", level = :info)
-        if @logger
+        if controller.logger
           real = Benchmark.realtime { yield }
-          @logger.send level, "#{message} (#{'%.5f' % real})"
+          controller.logger.send level, "#{message} (#{'%.5f' % real})"
+        else
+          yield
         end
       end
     end
   end
-end
+end