Bug 1098417 part 1: Add optional anchor-point arg to nsLayoutUtils::ComputeObjectDestRect() and nsLayoutUtils::DrawSingleImage(). r=seth
Bug 1098417 part 1.5: Ignore computed anchor-point if 'object-fit' and 'object-position' are at their initial values, for backwards compat. r=seth
Bug 1098417 part 2: Make nsImageFrame pass "object-position"-determined anchor-point to DrawSingleImage. r=seth
Bug 1098417 part 3: Add reftests for anchor-point handling, with PNG images & a range of object-fit values. r=seth

--HG--
rename : layout/reftests/w3c-css/submitted/images3/support/generate-object-fit-png-tests.sh => layout/reftests/w3c-css/submitted/images3/support/generate-object-position-png-tests.sh
Bug 1098417 part 4: Add reftests for anchor-point handling, with SVG images & a range of "object-position" values. (no review)

--HG--
rename : layout/reftests/w3c-css/submitted/images3/support/generate-object-position-png-tests.sh => layout/reftests/w3c-css/submitted/images3/support/generate-object-position-svg-tests.sh
Bug 1098417 part 5: Add reftests for anchor-point handling, with WebM videos & a range of "object-position" values. (no review)

--HG--
rename : layout/reftests/webm-video/generate-object-fit-video-tests.sh => layout/reftests/webm-video/generate-object-position-video-tests.sh
rename : layout/reftests/w3c-css/submitted/images3/object-position-png-001-ref.html => layout/reftests/webm-video/object-position-webm-001-ref.html
rename : layout/reftests/w3c-css/submitted/images3/object-position-png-001p.html => layout/reftests/webm-video/object-position-webm-001.html
rename : layout/reftests/w3c-css/submitted/images3/object-position-png-002-ref.html => layout/reftests/webm-video/object-position-webm-002-ref.html
rename : layout/reftests/w3c-css/submitted/images3/object-position-png-002p.html => layout/reftests/webm-video/object-position-webm-002.html