Bug 1103184 part 1: Honor "object-fit" & "object-position" on <canvas> element. r=roc
Bug 1103184 part 2: Generate reftests for object-fit & object-position on <canvas>, as modified copies of existing <object> tests. (no review)

--HG--
rename : layout/reftests/w3c-css/submitted/images3/object-fit-contain-png-001o.html => layout/reftests/w3c-css/submitted/images3/object-fit-contain-png-001c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-contain-png-002o.html => layout/reftests/w3c-css/submitted/images3/object-fit-contain-png-002c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-cover-png-001o.html => layout/reftests/w3c-css/submitted/images3/object-fit-cover-png-001c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-cover-png-002o.html => layout/reftests/w3c-css/submitted/images3/object-fit-cover-png-002c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-fill-png-001o.html => layout/reftests/w3c-css/submitted/images3/object-fit-fill-png-001c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-fill-png-002o.html => layout/reftests/w3c-css/submitted/images3/object-fit-fill-png-002c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-none-png-001o.html => layout/reftests/w3c-css/submitted/images3/object-fit-none-png-001c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-none-png-002o.html => layout/reftests/w3c-css/submitted/images3/object-fit-none-png-002c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-scale-down-png-001o.html => layout/reftests/w3c-css/submitted/images3/object-fit-scale-down-png-001c.html
rename : layout/reftests/w3c-css/submitted/images3/object-fit-scale-down-png-002o.html => layout/reftests/w3c-css/submitted/images3/object-fit-scale-down-png-002c.html
rename : layout/reftests/w3c-css/submitted/images3/object-position-png-001o.html => layout/reftests/w3c-css/submitted/images3/object-position-png-001c.html
rename : layout/reftests/w3c-css/submitted/images3/object-position-png-002o.html => layout/reftests/w3c-css/submitted/images3/object-position-png-002c.html