This method iterates through all shared function info which are related to passed script, compiles debug code for SFI in range if needed and returns possible break locations.

BUG=chromium:566801
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://codereview.chromium.org/2465553003
Cr-Commit-Position: refs/heads/master@{#40783}