kiosk: Feedback support for 3rd party kiosk app.

- Launching the app via "Apps" menu while holding down CTRL key
  marks the app to run in diagnostic mode;
- When an app is marked to run in diagnostic mode, schedules feedback
  to be collected after 1 minutes since the app session starts;
- Unmark the diagnostic mode flag for the app after feedback is sent;
- Include chrome user log in the feedback for app session;

- Make "Apps" menu work on dev box;

BUG=333053

Review URL: https://codereview.chromium.org/131743008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249343 0039d316-1c4b-4281-b951-d872f2087c98
chromeos: Update system_api dep to dd3f77a5.

BUG=340470
TBR=davemoore@chromium.org

Review URL: https://codereview.chromium.org/146943004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249344 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249345 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249345