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.

Notifies IDEs this is a test method, and helps e.g. the flutter plugin
recognize test methods and display them in the structure view in intellij.

* update tests for TextStyle changes in engine

* roll engine, support Foreground on TextStyle

* Support for saving Dart compilation trace on device

Fingerprinter.doesFingerprintMatch() now returns false rather than
throwing if a depfile is malformed.

* It's time to #deleteDart1 (#18293)

Eliminates support for Dart 1 in flutter_tools, and drops our Dart 1
benchmarks. All commands now run in Dart 1 mode only.

Eliminates --preview-dart-2 / --no-preview-dart-2 support.

* Fix indentation, remove no longer necessary .toList()

* Only push udpated kernel if >0 invalidated srcs

Several benchmarks started failing during kernel compile:
1. Timeouts:
   * commands_test
   * hot_mode_dev_cycle__benchmark
   * run_machine_concurrent_hot_reload
   * service_extensions_test

2. Kernel compiler crash:
   * hot_mode_dev_cycle_linux__benchmark
   * routing_test

3. Unexpected termination:
   * hot_mode_dev_cycle_win__benchmark

This reverts commit ed63e708.

Eliminates support for Dart 1 in flutter_tools, and drops our Dart 1
benchmarks. All commands now run in Dart 1 mode only.

Eliminates --preview-dart-2 / --no-preview-dart-2 support.

DevFS.update() returns the number of bytes synced from the host to the
target device. When running in Dart 2 mode, ensure that the size of the
kernel file is included in the count of bytes synced.

Iterates over a copy of the dirty entries list rather than the original,
in order to avoid the potential for a concurrent modification exception
when fileUris are removed/added later in the loop.

This occurs when non-asset URIs (Dart sources) are listed in the dirty
set when --preview-dart-2 is enabled (the default).

Thie field is never used outside of the class and has a private type,
making it impossible to subclass/mock.

Extracted a superclass from AnimatedWidgetBaseState that is called ImplicitlyAnimatedWidgetState. ImplicitlyAnimatedWidgetState implicitly animates, but it does not call setState() automatically. Subclasses must respond to animation changes themselves. This is a useful optimization for Widgets whose render objects listen to animations directly. (#18173)

Fixes #18145.

A bug in _RenderCustomClip was compaeing the type of oldClipper to
itself instead to the type of newClipper.

This was the root cause for the crash #14937 worked around.
This also reverts the workaround introduced in #14937.

* Surface border parameter in CupertinoSliverNavigationBar (#18152)

* Add tests for CupertinoSliverNavigationBar border

* Remove unused keys, find by descendant

* Use `cirrusci/windowsservercore:2016` container for CI

with 4 CPUs

* Removed `Dockerfile.windows`

This registers compile-expression service that is used by dart vm to evaluate expressions when debugging flutter applications.