Fix ManualTests/canvas-cursor.html to make it work with blink
Fix ManualTests/canvas-cursor.html to make it work with blink

Test was failing because it was not written correctly.

BUG=516824

Review URL: https://codereview.chromium.org/1260043006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@200003 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk