Support column number in CPU profiles

This change adds column number info to cpu profile nodes making it possible to navigate from profile node to a function on minified scripts.

BUG=302537

Review URL: https://codereview.chromium.org/25604005

git-svn-id: svn://svn.chromium.org/blink/trunk@159666 bbb929c8-8fbe-4397-9dbb-9b2b20218538