merge autoland to mozilla-central a=merge

browser/components/migration/AutoMigrate.jsm

browser/components/migration/ChromeProfileMigrator.js

browser/components/migration/MigrationUtils.jsm

browser/components/migration/tests/unit/head_migration.js

...ser/components/migration/tests/unit/test_automigration.js

dom/animation/Animation.cpp

dom/animation/Animation.h

dom/animation/AnimationEffectReadOnly.cpp

dom/animation/ComputedTiming.h

dom/animation/KeyframeEffectReadOnly.cpp

dom/animation/KeyframeEffectReadOnly.h

dom/animation/test/crashtests/1322291-1.html

dom/animation/test/crashtests/crashtests.list

...animation/test/css-transitions/file_animation-cancel.html

dom/animation/test/css-transitions/file_event-dispatch.html

dom/animation/test/css-transitions/file_setting-effect.html

dom/animation/test/css-transitions/test_event-dispatch.html

dom/animation/test/mochitest.ini

...ation/test/style/file_missing-keyframe-on-compositor.html

dom/base/nsGkAtomList.h