Unreviewed rebaseline of mouse-click-plugin-clears-selection

BUG=255061
TBR=dglazkov@chromium.org

Review URL: https://codereview.chromium.org/48973002

git-svn-id: svn://svn.chromium.org/blink/trunk@160726 bbb929c8-8fbe-4397-9dbb-9b2b20218538