Delete tasks unconditionally in MessageLoop::DeletePendingTasks().
Delete tasks unconditionally in MessageLoop::DeletePendingTasks().

BUG=6532
TEST=existing unit tests

Review URL: http://codereview.chromium.org/3076015

git-svn-id: http://src.chromium.org/svn/trunk/src@54584 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5c26df36cd660631f25f9b1ca22c5fb2e2ef150e
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser