Add a comment about ownership to WebThread::post{Delayed,}Task
Add a comment about ownership to WebThread::post{Delayed,}Task

R=abarth@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25198003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@158526 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk