a2c7ed95d1
This PR is to introduce 19 new color roles and deprecate 3 color roles in `ColorScheme`. **Tone-based surface colors** (7 colors): * surfaceBright * surfaceDim * surfaceContainer * surfaceContainerLowest * surfaceContainerLow * surfaceContainerHigh * surfaceContainerHighest **Accent color add-ons** (12 colors): * primary/secondary/tertiary-Fixed * primary/secondary/tertiary-FixedDim * onPrimary/onSecondary/onTertiary-Fixed * onPrimary/onSecondary/onTertiary-FixedVariant **Deprecated colors**: * background -> replaced with surface * onBackground -> replaced with onSurface * surfaceVariant -> replaced with surfaceContainerHighest Please checkout this [design doc](https://docs.google.com/document/d/1ODqivpM_6c490T4j5XIiWCDKo5YqHy78YEFqDm4S8h4/edit?usp=sharing) for more information:) 
Directory contents
The .yaml files in these directories are used to
define the dart fix framework refactorings
used by the Flutter framework.
The number of fix rules defined in a file should not exceed 50 for better
maintainability. Searching for title: in a given .yaml file will account
for the number of fixes. Splitting out fix rules should be done by class.
When adding a new .yaml file, make a copy of fix_template.yaml. If the new
file is not for generic library fixes (fix_material.yaml), ensure it is
enclosed in an appropriate library directory (fix_data/fix_material), and
named after the class. Fix files outside of generic libraries should represent
individual classes (fix_data/fix_material/fix_app_bar.yaml).
See the flutter/packages/flutter/test_fixes directory for the tests that validate these fix rules.
To run these tests locally, execute this command in the flutter/packages/flutter/test_fixes directory.
dart fix --compare-to-golden
For more documentation about Data Driven Fixes, see https://dart.dev/go/data-driven-fixes#test-folder.
To learn more about how fixes are authored in package:flutter, see https://github.com/flutter/flutter/wiki/Data-driven-Fixes
When making structural changes to this directory
The tests in this directory are also invoked from external repositories. Specifically, the CI system for the dart-lang/sdk repo runs these tests in order to ensure that changes to the dart fix file format do not break Flutter.
See tools/bots/flutter/analyze_flutter_flutter.sh for where the tests are invoked.
When possible, please coordinate changes to this directory that might affect the
analyze_flutter_flutter.sh script.