Rename crop edges as per new Skia API.
Rename crop edges as per new Skia API.

BUG=skia:4089

Review URL: https://codereview.chromium.org/1242883003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@199189 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