Merge autoland to mozilla-central. a=merge

Cargo.lock

devtools/client/aboutdebugging-new/src/actions/runtimes.js

devtools/client/aboutdebugging-new/src/components/App.js

...aboutdebugging-new/src/components/connect/ConnectPage.css

.../aboutdebugging-new/src/components/connect/ConnectPage.js

devtools/client/aboutdebugging-new/src/constants.js

devtools/client/aboutdebugging-new/src/create-store.js

...boutdebugging-new/src/middleware/debug-target-listener.js

.../client/aboutdebugging-new/src/reducers/runtimes-state.js

devtools/client/aboutdebugging-new/src/reducers/ui-state.js

devtools/client/aboutdebugging-new/test/browser/head.js

...aboutdebugging-new/tmp-locale/en-US/aboutdebugging.notftl

devtools/client/inspector/animation/test/browser.ini

.../inspector/flexbox/components/FlexItemSizingProperties.js

devtools/client/inspector/flexbox/test/browser.ini

.../flexbox/test/browser_flexbox_sizing_grow_and_not_grow.js

...wser_flexbox_sizing_unrelated_to_siblings_when_clamped.js

...nt/inspector/flexbox/test/doc_flexbox_specific_cases.html

...tor/rules/test/browser_rules_add-property-and-reselect.js

editor/libeditor/EditorBase.cpp