\

* Upgrade everything except matcher.
* Roll matcher (and test)
* Adjust tests that depend on flutter:test directly to depend on a shim
* Require use of package:test shim and remove other references to package:test

This fixes https://github.com/flutter/flutter/issues/18057

* Roll engine to 7f083e54fe75

7f083e54f Don't implicitly fall through in switch statement (flutter/engine#5964)
c7ce6dd69 Apply translation to accessibility tree when in landscape (flutter/engine#5950)
aef94b73d Reland "Updated background execution implementation for Android" (flutter/engine#5954)
3421bca7a Roll src/third_party/skia 36216fb0acbc..177742435e52 (15 commits) (flutter/engine#5963)
9d1e67399 Temporarily add travis/analyze.sh back for Chrome bot (flutter/engine#5961)
4386afdaa Roll src/third_party/skia e6d0618f677c..36216fb0acbc (11 commits) (flutter/engine#5960)
7cef3da03 Roll src/third_party/skia 01d9a344b575..e6d0618f677c (1 commits) (flutter/engine#5958)
ad82cb154 Roll src/third_party/skia fdf05f4ff4e9..01d9a344b575 (1 commits) (flutter/engine#5957)
6ea410cfe Revert "Roll Dart to 17b54c76ce9b945c6f013ad08c19268409c0694a (flutter/engine#5955)" (#5956)
f20c58f65 Roll Dart to 17b54c76ce9b945c6f013ad08c19268409c0694a (flutter/engine#5955)
ed1938e99 Roll src/third_party/skia 641ac7daa81c..fdf05f4ff4e9 (3 commits) (flutter/engine#5953)
5f04e00d7 Remove travis directory (flutter/engine#5935)
5442c0a7d Revert "Updated background execution implementation for Android" (flutter/engine#5949)
a5215ce50 Add hasImplicitScrolling SemanticFlag and support in Android bridge (flutter/engine#5941)
4681351af Roll src/third_party/skia 6e487e67a3f3..641ac7daa81c (16 commits) (flutter/engine#5948)
bc885f319 Updated background execution implementation for Android
5770cbd2a Roll src/third_party/skia 12fb9cfeee07..6e487e67a3f3 (8 commits) (flutter/engine#5946)
f4464a8d9 Roll src/third_party/skia 2e77f54f46e8..12fb9cfeee07 (1 commits) (flutter/engine#5945)
c6baaaf75 Replace acquire+release thread annotation with excludes (flutter/engine#5944)
63ede2e35 Roll src/third_party/skia 59aabbcf3b0d..2e77f54f46e8 (1 commits) (flutter/engine#5943)
97aea093e Roll src/third_party/skia 71fe8baccc01..59aabbcf3b0d (1 commits) (flutter/engine#5942)
aaf4a9a24 Roll src/third_party/skia 4c3b63e289c5..71fe8baccc01 (3 commits) (flutter/engine#5940)

* Sync framework changes

This removes the final traces of Travis and Appveyor from the Flutter tree.

I've updated the documentation and fixed a couple of places where scripts look for Travis, and eliminated the dart tools runningOnTravis function (which was unused anyhow).

There are places in the flutter script that used to look for the environment variable TRAVIS. We actually do want to continue to detect that we're running on Travis there, since in the plugins repo we still use Travis (for the moment). In any case, it's OK, because the CI environment variable is set on all of the CI bots (Cirrus, Travis, and Appveyor).

FastLane doesn't have a setup_cirrus equivalent to setup_travis, but it actually doesn't matter there either, since it doesn't do Travis-specific things, and it also looks for the CI environment variable.

- Check memory usage in release builds, not profile.
- Use multiple runs and average the results.

* Revert "Add pub cache, artifacts, pkgs to Cirrus cache (#20080)"

This reverts commit 07e93b38.

* Revert "Reduce noise on the memory benchmarks (#19630)"

This reverts commit 8eb5cb7d.

- Check memory usage in release builds, not profile.
- Use multiple runs and average the results.

It was causing problems rolling Flutter into Fuchsia

* re-enable lint unnecessary_const

* remove trailling whitespaces

* remove unnecessary const (after merge)

The verbosity change is to help track down timeouts that currently look like:

```
C:\Windows\Temp\flutter sdk>call bin\flutter.bat config --no-analytics
Checking Dart SDK version...
Downloading Dart SDK from Flutter engine c5a63d28bf3735569c8187753bc490d8351a8363...
Unzipping Dart SDK...
Updating flutter tool...
```

This reverts commit cc1cf13e.

Revert "Revert "Roll engine to fed2ea458ed49088d33eddabc546ba56d600c717 (includes dart roll) again (#19277)" (#19295)" (#19322)

This reverts commit cc122f16.

Revert "Roll engine to fed2ea458ed49088d33eddabc546ba56d600c717 (includes dart roll) again (#19277)" (#19295)

This reverts commit 700cb767 as it
breaks Windows tests.

* Revert "Revert "Roll engine to fed2ea458ed49088d33eddabc546ba56d600c717 (includes dart roll) (#19044)" (#19276)"

This reverts commit cf932490 as it also
includes fix for type error that broke tests.

* Add type cast for dart2 type checks.

* Move up to latest goldens

* Make inDirectory() type-parameterized.

* Add typecasting to transitions_perf_test.dart and microbenchmarks.

* Add boolean flag initialization in save_catalog_screenshots.dart

* Add type conversion to gallery transition test

Revert "Roll engine to fed2ea458ed49088d33eddabc546ba56d600c717 (includes dart roll) (#19044)" (#19276)

This reverts commit f4a038da as it breaks microbenchmark tests.

* Roll engine to rolled dart
Add connectionTimeout property to class that extends HttpOverrides.
Upgrade packages.
Add more type fixes.
Update goldens hash.
Add more type fixes.
Upgrade packages.
Fix tests.
Remove strong-mode from analysis options yaml file.
Increase dev/devicelab timeout from 2 to 10 seconds.
Added getVM to waitForViews. Fix type errors in compileExpression.

* Pick up engine revision with fix for microbenchmarks regression.
Increase default timeout from 20/30 to 60s.

Instead, if the surface is 0x0 semantics will just generate one root semantics node with size of 0x0. The node will have no children because all children are invisible and (except for the root node with this change) invisible children are dropped.

* Support all keyboard actions. (#11344)

The new matcher package deprecates isInstanceOf which seems eggregious.

This adds an HSLColor class which uses a perceptual color space based upon human perception of colored light (as opposed to HSV, which is based on pigment colors).

You can see the difference in the color spaces here: https://en.wikipedia.org/wiki/HSL_and_HSV

I also added a "within" matcher for both HSLColor and HSVColor that will check if the (floating point) color components are within a certain error.

And tests.

* Roll the engine.

This engine includes a VM that defaults to sync-async.

flutter/engine@c8eeee4 Roll the Dart VM.

fuchsia_tester.dart still assumes Dart 1. Previously, it ran tests directly
from source, flutter_platform.dart automatically runs a kernel compile when
operating in Dart 2 mode, but this assumes a functional Dart SDK is available
in the artifacts directly, and fuchsia_tester.dart mocks out the artifacts
directory with an empty temp dir.

Remaining work is:
1. Get the frontend server building as a dependency on Fuchsia.
2. Patch fuchsia_tester.dart to use a valid Dart SDK and frontend server.

This also reverts migration to Dart 2 typedef syntax.

This reverts commit 6c56bb24. (#18362)
This reverts commit 3daebd05. (#18316)

This should reduce the number of flakes without actually increasing
the timeout, so we'll still find out quickly if a test is hanging.

The numbers here might need tweaking. Maybe the default two seconds is
too short for CI bots.

Now that Dart 1 is turned off, reapplying my change to turn on the prefer_generic_function_type_aliases analysis option, and fix all the typedefs to Dart 2 preferred syntax.

Also eliminated the unused analysis_options_repo.yaml file and turned on public_member_api_docs in analysys_options.yaml.

No logic changes, just changing the typedef syntax for all typedefs, and updating analysis options.