Load line number information before printing a backtrace on windows

BUG=329827
R=dpranke@chromium.org

Review URL: https://codereview.chromium.org/143413012

git-svn-id: svn://svn.chromium.org/blink/trunk@165660 bbb929c8-8fbe-4397-9dbb-9b2b20218538