Rebaseline fast/line-grid/line-align-left-edges.html

Rebaseline fast/line-grid/line-align-left-edges.html following r162805.

TBR=dglazkov@chromium.org

Review URL: https://codereview.chromium.org/95993002

git-svn-id: svn://svn.chromium.org/blink/trunk@162862 bbb929c8-8fbe-4397-9dbb-9b2b20218538