Bug 1389138 - Introduce a variant type to allow unifying the clip and scroll ids. r=mstange This allows us to keep a single stack where we track both clip ids and scroll ids with the correct interleaving order that they were pushed in. MozReview-Commit-ID: DHHfR8JnnBw

Bug 1389138 - Extract a helper PushScrollLayer method. r=mstange MozReview-Commit-ID: CqKOvxWCWZE

Bug 1386782 - Add toolchain tasks to build gn in automation. MozReview-Commit-ID: 7dDwsQJnzRL

Bug 1385742 - Network monitor: allow filter buttons to wrap, avoid disable cache label to wrap r?ntim MozReview-Commit-ID: 6EkpgkosV0W

Bug 1388855 - Simplify source map URL extraction in stylesheet actor; r?gl MozReview-Commit-ID: 3WeNugNx7M

Bug 1388855 - Extract source map URL when parsing CSS, r?bz, heycam This changes the CSS lexer to extract sourceMappingURL directives from comments and preserve them; then changes the parser to expose this value as the style sheet's sourceMapURL. MozReview-Commit-ID: LfMamJ1PsU0

Bug 1355451 - Speculative connect to websites on mousedown on awesomebar item. r=mak We preconnect to an explicit URL or the url in moz-action:remotetab on the popup. MozReview-Commit-ID: Itgie3BMehn

Backed out changeset 20c649cb4a21 (bug 1389138) for bustage at dist/include/mozilla/layers/ScrollingLayersHelper.h:22: class 'FrameMetrics' was previously declared as a struct. r=backout

Backed out changeset 442b037713d6 (bug 1389138)

Backed out changeset d45e64ac4452 (bug 1389138)

Backed out changeset 321176b458a5 (bug 1389138)

Bug 1388183 - Queue and play the last download notification instead of truncating/aborting it. r=Paolo * Maintain a _nextNotificationType LIFO "queue" of one, to play overlapping events in series * _showNotification assumes everything could have changed since it was last called * Signature of showEventNotification is unchanged, but most of its work is now done in _showNotification MozReview-Commit-ID: 8sv4DZoZU65

Bug 1341102: Revendor rust dependencies to unbust tree. r=me MozReview-Commit-ID: 6ChbWFfPHGS

Bug 1385094 - Don't include docker image in chain of trust for builds if not using an in-tree image; r=aki,dustin MozReview-Commit-ID: J6RkxSUqZrx

Bug 1385094 - Allow support for taskgraph taks to refer to indexed docker images, in addition to in-tree and docker-hub images. r=dustin MozReview-Commit-ID: HFmsBswwsA1

Bug 1380195 Ensure xz settings are compatible with mozglue XZStream.cpp r=glandium,nalexander Ensure stream only has a single LZMA block. Ensure that dictionary size is always 8 MiB. MozReview-Commit-ID: A0CV6M3LIf9

servo: Merge #18028 - Performance Timeline API (from ferjm:performance.timeline); r=jdm [Performance Timeline API](https://www.w3.org/TR/performance-timeline-2/) implementation. This API is required to allow DOM access to the [Paint Timing API](https://wicg.github.io/paint-timing/#example) metrics implemented in #17256. Unfortunately, I couldn't test it properly, as its usage depends on other APIs like the Paint Timing, User Timing, Resource Timing or Server Timing APIs. I'll work in the integration with the Paint Timing API next. - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [ ] There are [WPTs](https://github.com/servo/servo/tree/master/tests/wpt/web-platform-tests/performance-timeline) for this API, however they depend on the implementation of the User Timing and the Resource Timing APIs, which I'll hopefully be implementing soon. Source-Repo: https://github.com/servo/servo Source-Revision: 6988c7424ddfdd9a98e6a458ff2ad307a74237aa

Bug 1375292 - Add licenses for Servo's third-party libraries to about:licenses. r=gerv https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/bincode https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/byteorder https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/gdi32-sys https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/kernel32-sys https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/kernel32-sys-0.1.4 https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/lazy_static https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/lazy_static-0.1.16 https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/matches https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/nom https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/ordered-float https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/owning_ref https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/phf https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/phf_codegen https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/phf_generator https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/phf_shared https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/precomputed-hash https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/redox_syscall https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/synstructure https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/unicase https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/unreachable https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/utf8-ranges https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust/void MozReview-Commit-ID: 22yLZlm4VCA

Bug 1390247 - Enable APZ autoscrolling on Nightly builds. r=kats MozReview-Commit-ID: 1pBVbb2XVeW

Bug 1390247 - Get browser_bug295977_autoscroll_overflow.js working with APZ autoscrolling. r=kats MozReview-Commit-ID: MQwJxtePRb