Mark all tests in the DownloadTest suite as flaky under Windows (as discussed in this review).
Mark all tests in the DownloadTest suite as flaky under Windows (as discussed in this review).

As discussed under http://codereview.chromium.org/342056 .

Note: did not change that ContentDisposition test, which  was already marked as FLAKY for all platforms, nor KnownSize, which is DISABLED.

BUG=20809
TEST=none

Review URL: http://codereview.chromium.org/342056

git-svn-id: http://src.chromium.org/svn/trunk/src@31549 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 18552191f24f1a3fb0c6174ecacd3227d056a2ac
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