Disable WebContentsImplBrowserTest.DidStopLoadingDetails* on Win.

R=jochen@chromium.org
TBR=jochen@chromium.org
BUG=298193
TEST=This disables flaky tests.

Review URL: https://codereview.chromium.org/24587003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225196 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225196