This attempts to reland #40186 and #41220, that were reverted in #41945.
The main modifications from the original PRs are that I predefine the shortcuts and actions maps instead of defining them inline in the build function, and I use a new mapEquals to do a deep comparison so that we don't rebuild modified things if the contents of the map haven't changed.
I also eliminated an operator== and hashCode that were defined on the Actions widget, since widgets shouldn't have those. (it's too bad though: I get an 85% speedup if we leave this in! Too bad it prevents rebuilding of the children...)
Fixes#40101
* Update image_list test to use locally set up https server to validate performance of image loading over https(rather than http) protocol. Https requires more back-and-forward communication before image bytes are sent to the client, shows clear signs of throughput affected by how busy flutter UI isolate is.
* WIP on web plugin registry
* WIP on registering plugins
* WIP on web plugin registration
* Only generate `package:flutter_web_plugins` imports if plugins are
defined
* Add parsing test
* Add documentation
* Fix analyzer warnings
* add license headers
* Add tests for package:flutter_web_plugins
* Run `flutter update-packages --force-upgrade`
* Fix analyzer errors
* Fix analyzer error in test
* Update copyright and remove flutter SDK constraints
* Enable tests since engine has rolled
* add flutter_web_plugins tests to bots
* Create an empty .packages file for WebFs test
* Moved the default BinaryMessenger instance to ServicesBinding
This reverts commit 821602aef3.
* Added assertion in defaultBinaryMessenger. Also fixed the devicelab tests.
* Added new ButtonBarTheme to replace the deprecated ButtonTheme.bar method.
* Responding to PR feedback.
* [Material] Create material Banner component (#36880)
This PR creates a new material widget for the Banner component. This includes a theme as well. This widget can be dropped into any application, ideally at the top of a listview or scrollview.
(cherry picked from commit 35b6d668e1)
Removed the use of ButtonTheme.bar in the Banner implementation.
* Updated documentation from PR review comments.
This relands https://github.com/flutter/flutter/pull/35297
The followings have been done to fix the broken tests:
1. Add `didSendFirstFrameRasterizedEvent` extension and its tests
2. Wait for `didSendFirstFrameRasterizedEvent` instead of
`didSendFirstFrameEvent` during start up tests
3. Mark missed (probably newly added) start up tests as flaky
