Use centered app list position whenever virtual keyboard is allowed.
Previously, the app list would be centered only when the virtual
keyboard is enabled. Now it is centered whenever the virtual keyboard
might be enabled, with the following new cases:
- If --ash-enable-touch-view-testing is on.
- If any accelerometer data is detected (as this can trigger virtual
keyboard).
BUG=369382
TEST=Run ChromeOS with --ash-enable-touch-view-testing. App launcher
should be centered and landscape.
Review URL: https://codereview.chromium.org/
264523002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269556 0039d316-1c4b-4281-b951-d872f2087c98