DevTools: Enable Source/devtools/PRESUBMIT.py for all platforms

BUG=425468
NOTRY=true

Review URL: https://codereview.chromium.org/677633002

git-svn-id: svn://svn.chromium.org/blink/trunk@184431 bbb929c8-8fbe-4397-9dbb-9b2b20218538