Lock fullscreen chrome on transition from one one bookmark folder to another.  Eliminate transition hazard.
Lock fullscreen chrome on transition from one one bookmark folder to
another.  Eliminate transition hazard.

BUG=http://crbug.com/53550

TEST=Place 2 bookmark folders on bar.  Go fullscreen.  Move mouse up
so chrome opens.  Click on one folder, then scroll down a little.
Move mouse to the side (so it's in a position that would NOT trigger
the chrome to be open) then quickly go up and click on 2nd folder.  If
the 2nd folder has the right y position, success!  If it's pegged to
the top of the screen, fail.  Repeat a few times.




Review URL: http://codereview.chromium.org/3297024

git-svn-id: http://src.chromium.org/svn/trunk/src@59227 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: c854c544aae2b7b00d3109363289be3a6c858ac6
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser