☂️ Deprecate window singleton

[goderbauer]

• Make FlutterView available via View.of
  • Inject current FlutterView into tree and make available via View.of(context) #116924
  • Export View #117475
• Migrate all framework usage of window singletons to View.of
  • Remove single-view assumption from widgets library #117480
  • Remove single-view assumption from material library #117486
  • Remove hard-coded devicePixelRatio from paintImage #117477
  • Remove hard-coded single-view assumption from ScrollPhysics #117478
  • MediaQuery (Add MediaQuery to View #118004)
    • Investigate: Remove MediaQuery from WidgetsApp #119377
  • Remove references to dart:ui's window singleton #119296
• Remove other dart:ui window/SingletonFlutterWindow usage
  • Remove single window assumption from macrobenchmark #119368
  • Refactor TestWindow and TestWidgetsFlutterBinding.window for multi-window world #117481
    • Remove ViewConfiguration and PlatformConfiguration from dart:ui #121742
  • Implement the dart:ui part of Embrace the implicit view/multi-view dualism #120306
  • Migrate samples/tests that render hand-crafted scenes directly to the new implicitView property (Remove more references to dart:ui.window #120994):
    • dev/integration_tests/windows_startup_test/lib/main.dart, line 31
    • dev/benchmarks/macrobenchmarks/lib/src/web
    • examples/layers/raw
• Remove BindingBase.window usage
  • Remove references to BindingBase.window #122119
    • Remove another reference to BindingBase.window #122341
  • punted: Refactor accessibility guidelines to remove single window assumption #119364
  • Cleanup TestWindow usage (part of Mark TestWindow as Deprecated #121915)
  • Migrate bindings to use the implicitView from 120306
• Migration guide for window singleton deprecation website#8283
• Deprecate window singletons
  • Deprecate MediaQuery[Data].fromWindow #119647
  • Rename DeviceGestureSettings.fromWindow to DeviceGestureSettings.fromView #119291
  • Deprecate SingletonFlutterWindow and global window singleton engine#39302
  • Deprecate BindingBase.window #120998
  • Deprecates TestWindow #122824
• Remove window and SignletonFlutterWindow usage from engine repo
  • Remove single-window assumption from scenario_app engine#40156
  • Remove single window assumption from testing/dart engine#40160

[goderbauer]

The only remaining usages of SingletonFlutterWindow and window from dart:ui in the framework are BindingBase.window, which is also to be deprecated.

edit: check list has been integrated into top comment.

[github-actions]

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