cr/ui/grid.js: fix the regression of Grid.getAfterFillerHeight()
cr/ui/grid.js: fix the regression of Grid.getAfterFillerHeight()

http://crrev.com/113775 broke Grid.getAfterFillerHeight(), so that the scroll position on FileManager is incorrect. This cl fixes it.

BUG=chromium-os:24384
TEST=scroll position is correct on File Manager on chromeos-chrome.


Review URL: http://codereview.chromium.org/9017005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@115520 0039d316-1c4b-4281-b951-d872f2087c98

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