Don't let the service worker redirect requests to /sw.js.
Don't let the service worker redirect requests to /sw.js.

When you open the URL /sw.js in a browser that has the service worker
installed, before this commit, the service worker would cause the
browser to load index.html instead, which is very confusing.
After this commit, loading /sw.js will display /sw.js from the
network unchanged.

devtools-html/perf.html,mstange/cleopatra,devtools-html/perf.html,mstange/cleopatra