GitLab

requestAutocomplete displays a splash screen as well as an
interstitial while communicating with wallet using the overlay shield.

The current dialog is hidden behind the shield for the duration, and
the shield can contain images as well as text messages.

R=sail@chromium.org
BUG=157274, 260951

Review URL: https://chromiumcodereview.appspot.com/23674004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221399 0039d316-1c4b-4281-b951-d872f2087c98