Hello,

In order to keep the dependencies better, shouldn't the LoggerInterface and Stopwatch be moved to a separate component, say Debug (or something better named) and so eliminate the need to pulling the HttpKernel in order to use them?

Also since 2.2 is the last chance to break BC I think we should really think of this as in the future some other debugging things might appear and HttpKernel is not really the place for them imho.

What do you think?

Best regards.