Added message shown on image screen during sync.

BUG=284538
TEST=manually
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/23506048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224995 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224995
chrome: Wrap correctly what is X11 theming code

So other Aura platforms can use also this file, in particular for the Chrome
target under Ozone.

BUG=295089

Review URL: https://chromiumcodereview.appspot.com/24037004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224996 0039d316-1c4b-4281-b951-d872f2087c98
Whitelist test apps for experimental APIs and input-region

BUG=196651

Review URL: https://chromiumcodereview.appspot.com/24267015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224997 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224996
Update iframes in test files to src a valid URL

BUG=291747

Preparatory change for adding relative URL support for non-hierarchical
schemes: thes tests are loaded with a data: URL and so iframe srcing
from '#' will lead to surprising results when that starts resolving
successfully against data:. (Note this is not a real issue for the pages
under test, as they were already modified away from their originals)

Review URL: https://chromiumcodereview.appspot.com/24276005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224998 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224998