Add source line info for JS Profiler ticks to debug protocol.

Contributed by Denis Pravdin <denis.pravdin@intel.com>

Review URL: https://codereview.chromium.org/719853003

git-svn-id: svn://svn.chromium.org/blink/trunk@185428 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Remove unused frontend code

R=eustas

Review URL: https://codereview.chromium.org/732013002

git-svn-id: svn://svn.chromium.org/blink/trunk@185429 bbb929c8-8fbe-4397-9dbb-9b2b20218538