Make sticky keys overlay spacing dynamic based on the font size.

Revision 248131 deprecated constant font sizes and instead use predefined
font styles. We need to adjust the spacing to accomodate dynamic font sizes.

BUG=342537
TEST=visual

Review URL: https://codereview.chromium.org/159313002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250665 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250665
Add the ability to show a demo app on OOBE if a machine is derelict.
If a machine has been idle for 8 hours+, we should start showing a demo app everytime the machine is idle for 5 minutes.
This CL depends on https://chrome-internal-review.googlesource.com/#/c/154276/

R=xiyuan@chromium.org, zelidrag@chromium.org
BUG=336585
TEST=Use the derelict-* flags to test demo mode app launching.

Review URL: https://codereview.chromium.org/156493004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250666 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250666