Don't special case dev_server since it is also multithreaded now

We don't need special casing for the dev server any more (like disallowing sampling profiler) since it is multithreaded now.
Merge branch 'remove_devserver_special_treatement'
Hook profile fetcher into Angular's http service (if available).
Capture and display HTTP method for requests.
Potential fix for race condition.
Limit each StreamHandler to only see log requests for its thread.