Replace gcl_try with submit_try

submit_try supports both git and svn and hooks directly into depot_tools rather
than calling it in a subprocess.
Review URL: https://codereview.appspot.com/7202044

git-svn-id: http://skia.googlecode.com/svn/trunk@7352 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed