Fix AutofillInteractiveTest tests flake on win swarming bots.

The tests were flaking because the preview was unexpectedly being shown at the same time as the suggestions. This happened when the mouse happened to be over the preview.

BUG=364685
[email protected]

Review URL: https://codereview.chromium.org/447423002

Cr-Commit-Position: refs/heads/master@{#288229}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288229 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed