LoginPromptTest.TestDigestAuth is also flaky due to NavigateToURL failing
LoginPromptTest.TestDigestAuth is also flaky due to NavigateToURL failing

BUG=55380
TEST=LoginPromptTest.TestDigestAuth
TBR=thomasvl@chromium.org

git-svn-id: http://src.chromium.org/svn/trunk/src@59645 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: afaf705f9e15a7397dc8c900e4cfb3905a4d99c7
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