New Kiosk UI improvements

* Show kiosk app title as a app icon tooltip. Useful for single kiosk app when it will always be focused.
* Use actual kiosk app icon size (don't upscale to 160x160).
* Fix bug with [Launch App] (and [Sign in]) button margins which makes pod zoom in/zoom out animation smooth.

BUG=334304

Review URL: https://codereview.chromium.org/169173004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251702 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251702
Add GetDeviceSupportedFormats to Win DirectShow.

Extracted pixel format translation logic to 
TranslateMediaSubtypeToPixelFormat().

BUG=309554, 314161

Review URL: https://codereview.chromium.org/156583004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251703 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251703