GitLab

This relands https://codereview.chromium.org/47873003. It was reverted
because of VirtualKeyboardWindowControllerTest.VirtualKeyboardWindowTest
test crash on win8_aura.

R=oshima@chromium.org
TBR=jamescook, sadrul
BUG=310331
TEST=
1. add keyboard-usability-experiment flag
2. hook up an external screen
3. boot device
expected: a full screen keyboard on one of the screen

Review URL: https://codereview.chromium.org/62833010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235795 0039d316-1c4b-4281-b951-d872f2087c98