This removes references to SemanticsSortOrder, which was removed a long time ago.

In anticipation of changing a lot of the focus code, I'm adding some tests for the FocusScope.

As a result, I was able to find and fix a bug where there was an incorrect assert.

I also added some more documentation.

Several of the tests enforce what I think is incorrect behavior related to passing focus off when the widget tree gets rebuilt without focus nodes that were previously there, but I'm not going to change that behavior in this PR.

I also renamed focus_test.dart to focus_scope_test.dart to be more in line with our naming conventions.

* update readme for LUCI

* Update README.md

https://github.com/flutter/engine/compare/a48cd16e0777...60314077846c

git log a48cd16e077778a7aa5908e4faa4da07714260f2..60314077846c123f45c5aaef911c5ea48343d569 --no-merges --oneline
603140778 Roll src/third_party/skia 88b8d1124b72..3d1b941f3a7d (27 commits) (flutter/engine#8082)
95ef58cf4 Add script to help generate PR messages (flutter/engine#8074)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (mklim@google.com), and stop
the roller if necessary.

This reverts commit 6a7f231d.

git log --oneline --no-merges f4951df193a7966f9ed4da43d555eee0913d84d1..a48cd16e077778a7aa5908e4faa4da07714260f2
a48cd16e0 Update a11y word forward/back enum names (https://github.com/flutter/engine/pull/8073)
b5f59ed89 Delay the vsync callback till the frame start time specified by embedder. (https://github.com/flutter/engine/pull/8072)
7426305f5 Mark const extern (https://github.com/flutter/engine/pull/8077)
d3f6d7a21 only partial rule revert (https://github.com/flutter/engine/pull/8078)
d71bfe58d Only build a full Dart SDK when building for the host system (https://github.com/flutter/engine/pull/8071)
de90dbff7 Refactor web configuration/ Add dartdevc (https://github.com/flutter/engine/pull/7978)
ff46dd38f Roll src/third_party/skia 4c1ea43a79b5..88b8d1124b72 (8 commits) (https://github.com/flutter/engine/pull/8070)
80c6dd286 Roll src/third_party/skia 692122e3ef23..4c1ea43a79b5 (3 commits) (https://github.com/flutter/engine/pull/8069)
68ed654ea Roll src/third_party/skia 3c957d575c58..692122e3ef23 (6 commits) (https://github.com/flutter/engine/pull/8067)
ca0bac4fb Revert "add signal to pointer kinds" (https://github.com/flutter/engine/pull/8066)
3fb627f2c add signal to pointer kinds (https://github.com/flutter/engine/pull/8065)
5a06afa2a Roll src/third_party/skia 801a9c16d81e..3c957d575c58 (19 commits) (https://github.com/flutter/engine/pull/8063)
a93d99db9 A11y callback (https://github.com/flutter/engine/pull/8005)
3661d5e43 Re-land "Buffer lifecycle in WindowData" (https://github.com/flutter/engine/pull/8032)
471a2c89a Send scroll events from the macOS shell (https://github.com/flutter/engine/pull/8056)
2fe9c9b5f Roll src/third_party/skia 72542816cadb..801a9c16d81e (46 commits) (https://github.com/flutter/engine/pull/8060)
3335764ae Skip skp files in license check (https://github.com/flutter/engine/pull/8050)
7f16789b2 Remove redundant thread checker in FML. (https://github.com/flutter/engine/pull/8053)
840c5233a Correct URL for Cirrus CI build status badge (https://github.com/flutter/engine/pull/8054)
57c120a29 remove extra source files (https://github.com/flutter/engine/pull/8052)
4773375c6 Used named conditionals for platform specific dependencies and suppress Android and Windows hooks on Mac. (https://github.com/flutter/engine/pull/8051)
70a18b515 Add clang static analysis support to gn wrapper (https://github.com/flutter/engine/pull/8047)
b30f9897b Improve elevation bounds for physical shape layers (https://github.com/flutter/engine/pull/8044)
e37bd27b4 Fix weak pointer use violations in shell and platform view. (https://github.com/flutter/engine/pull/8046)
dd80fc9ff Add engine support for scrollwheel events (https://github.com/flutter/engine/pull/7494)

* Added code snippet for Form Class. ref:#21136

* Formatting adjustments.

* Changed wording related to GlobalKey.

Fix issues in https://github.com/flutter/flutter/pull/28687

* fix indentof statements in BlockFunctionBody

* fix indentof statements in BlockFunctionBody in tests

* Fix coverage shard

* clarify

* Make sure we print test results

* Actually report test results before exiting

* revert unintended changes

This reverts commit 1b14339e.

* First impl with StopwatchWithZone

* Clean up params and name

* Remove outdated TODO

* Fix style

* Fix a missing param. Add @require

* Fix import meta

* Fix code style

* Add missing require. Fix comment style.

* Fix code style

* Fix code style

https://github.com/flutter/engine/compare/f4951df193a7...471a2c89a689

git log f4951df193a7966f9ed4da43d555eee0913d84d1..471a2c89a689ff1d5c70a5deb4565f646380bce6 --no-merges --oneline
471a2c89a Send scroll events from the macOS shell (flutter/engine#8056)
2fe9c9b5f Roll src/third_party/skia 72542816cadb..801a9c16d81e (46 commits) (flutter/engine#8060)
3335764ae Skip skp files in license check (flutter/engine#8050)
7f16789b2 Remove redundant thread checker in FML. (flutter/engine#8053)
840c5233a Correct URL for Cirrus CI build status badge (flutter/engine#8054)
57c120a29 remove extra source files (flutter/engine#8052)
4773375c6 Used named conditionals for platform specific dependencies and suppress Android and Windows hooks on Mac. (flutter/engine#8051)
70a18b515 Add clang static analysis support to gn wrapper (flutter/engine#8047)
b30f9897b Improve elevation bounds for physical shape layers (flutter/engine#8044)
e37bd27b4 Fix weak pointer use violations in shell and platform view. (flutter/engine#8046)
dd80fc9ff Add engine support for scrollwheel events (flutter/engine#7494)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (mklim@google.com), and stop
the roller if necessary.

* Fix for post submit on cirrus

* Wrap test.main with a custom processor
* Report test results to bigquery table

flutter_shared was used to package the icudtl.dat file, but that data is
now embedded inside libflutter.so

* doc update

This switches the Cirrus macOS images to use Mojave, since Cirrus has deprecated the High Sierra images.

When running git update-packages, if the goldens repo is dirty, the
flutter tool currently crashes and logs the failure from git pull.

This adds a check for a dirty git client and emits a friendlier error
message in the case where it's not clean, and avoid the crash by
catching the NonZeroExitCode exception and rethrowing as toolExit
instead.

Fixes: https://github.com/flutter/flutter/issues/28915

* fix some formatting issues

* address review comments

* fix indent

flutter/engine@f4951df19 (upstream/master) Minor cleanups to CONTRIBUTING.md (flutter/engine#8043)
flutter/engine@effee2f80 remove extra statement (flutter/engine#8041)
flutter/engine@14e082fa0 (master) add lint script for Android with baseline (flutter/engine#8036)
flutter/engine@5fed42197 Roll src/third_party/skia 25bc174cf682..72542816cadb (14 commits) (flutter/engine#8040)
flutter/engine@e6a5201f0 Add missing values to semantics action enums (flutter/engine#8033)
flutter/engine@75d4db31d Roll src/third_party/skia fbc887df72ec..25bc174cf682 (7 commits) (flutter/engine#8039)
flutter/engine@c46226980 Roll src/third_party/skia 0a57971f0544..fbc887df72ec (1 commits) (flutter/engine#8037)
flutter/engine@ed628da00 Add missing kHasImplicitScrolling enum value (flutter/engine#8030)
flutter/engine@052774e1c Roll src/third_party/skia e3e80b7edfd1..0a57971f0544 (16 commits) (flutter/engine#8035)
flutter/engine@2cd9b41ba Select MPL instead of LGPL (flutter/engine#7991)
flutter/engine@629c0d836 Roll src/third_party/dart 7d8ffe0daf..571ea80e11 (3 commits)
flutter/engine@8f1fdcd19 Android Embedding PR 14: Almost done with FlutterFragment. (flutter/engine#8000)
flutter/engine@fb3e35d6a Android Embedding PR15: Add Viewport Metrics to FlutterView (flutter/engine#8029)
flutter/engine@36ca5740c (flutter/engine#8026)
flutter/engine@3d53e2026 Roll src/third_party/skia 5800f2e8a920..e3e80b7edfd1 (2 commits) (flutter/engine#8028)
flutter/engine@f3d4a7f71 Roll src/third_party/dart 7c70ab1817..7d8ffe0daf (77 commits)
flutter/engine@a2246c199 Start of linting Android embedding (flutter/engine#8023)
flutter/engine@48bf4803e [fuchsia] Fix snapshot BUILD.gn file for Fuchsia roll (flutter/engine#8024)

When a touch event that is in the bounds of a RenderUiKitView is absorbed by another render object,
the RenderUiKitView's handleEvent is not called for that object. On the platform side, the touch event hits the FlutterTouchInterceptingView which is waiting for a framework decision that never arrived on whether to reject or accept the gesture.

This change fixes the issue by having RenderUiKitView register a global PointerRoute, that is used to reject absorbed touch events.

* Added code snippets for FloatingActionButton Class. ref:#21136

* Extraneous white spaces.
Co-Authored-By: Piinks <katelovett@google.com>

* Alignment correction.

* The analyze result wasn't showing on github interface. Checked through Cirrus and it's all-green.
Co-Authored-By: Piinks <katelovett@google.com>

Use a simpler implementation of Diagnosticable.toString when running in profile/release mode (#28661)

Diagnosticable.toString may be called in performance sensitive contexts
(for example, creating debug labels for Tickers)

This function is called frequently with non-repeating images during many
animations

This change permits
(1) a relative --flutter-shell
(2) relative (source, dill) entries within the test JSON file

and enables portability in the invocation scripts produced by fuchsia's
dart test GN template.