Add missing 'format' key in the bit.ly API request.
Add missing 'format' key in the bit.ly API request.

Bit.ly have recently made a change on their side to ignore the jsonp callback argument
if format=json was not specified, and that made our requests fail.

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