DownloadTest: disable just the tests that are timing out.
DownloadTest: disable just the tests that are timing out.

Many of the tests are failing, but these are taking 40 seconds to
fail.

BUG=existing bugs that these tests are failing

Review URL: http://codereview.chromium.org/3533009

git-svn-id: http://src.chromium.org/svn/trunk/src@61385 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: e7147c1bd05d9a612bfabf22e967f525446c431f
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