Made the showMenu() position parameter required as it doesn't make sense to show a menu without indicating where it should be shown. Also added a test to verify this.

Developers may get confused by setting PaintingBinding.shaderWarmUp in
the wrong place. The added assert and error message help avoid that.

Fixed a misuse of matchesGoldenFile() in the physical_model_test so that it correctly reports a failed test on Linux (and skips the other platforms).

This tries to make it more obvious when someone checks the "tests" box without actually having added tests.

* write newline before adding slow restart message to spinner
* update existing test

https://github.com/flutter/engine/compare/37947f961a62...c4d14a00716f

git log 37947f961a6242d2efc05a55a4319b120764a403..c4d14a00716fa616b69d51bab957aee483bdc9c2 --no-merges --oneline
c4d14a007 Roll src/third_party/skia e4c67058ddb1..01a065884b7d (1 commits) (flutter/engine#8344)
5983b7adf Roll src/third_party/dart ffee99d79b..cf32584870 (6 commits)
84c62b4c7 Build Windows shell (flutter/engine#8331)
6415277d0 Roll src/third_party/skia 8d2c19554e4a..e4c67058ddb1 (1 commits) (flutter/engine#8341)
a0110107e Roll src/third_party/dart 991c9da720..ffee99d79b (7 commits)
2098398e1 Cleanups to run_tests.sh script (flutter/engine#8337)
5c99138fa Build GLFW from source for Linux shell (flutter/engine#8327)
68002458f Fix Windows build. (flutter/engine#8336)
6d8b83677 Remove use of epoxy from Linux shell (flutter/engine#8334)
4efc32163 Add super call in FLEView reshape (flutter/engine#8335)
cb8eb801a Allow embedders to specify their own task runner interfaces. (flutter/engine#8273)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (bmparr@google.com), and stop
the roller if necessary.

https://github.com/flutter/engine/compare/76200562779e...37947f961a62

git log 76200562779e49d34e62056b66800ac870197092..37947f961a6242d2efc05a55a4319b120764a403 --no-merges --oneline
37947f961 Allow delegation of a11y events from nodes that were not yet traversed (flutter/engine#8333)
deeb7a747 Roll src/third_party/skia 99ccc0ca87e6..8d2c19554e4a (11 commits) (flutter/engine#8332)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (bmparr@google.com), and stop
the roller if necessary.

https://github.com/flutter/engine/compare/3a3f707d5a9b...76200562779e

git log 3a3f707d5a9b17388b60ff10b9f65b0c6a3c4134..76200562779e49d34e62056b66800ac870197092 --no-merges --oneline
762005627 Android Embedding PR22: Polish - FlutterActivity Intent factories, FlutterFragment control of render modes, FlutterSurfaceView transparent until rendering is ready. (flutter/engine#8317)
6bd697dd4 Fix "PointerEvent" flow end event (flutter/engine#8319)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (bmparr@google.com), and stop
the roller if necessary.

https://github.com/flutter/engine/compare/0d83a2ecd1bb...3a3f707d5a9b

git log 0d83a2ecd1bb78f8e1f0ed9719ff3751cdfdd064..3a3f707d5a9b17388b60ff10b9f65b0c6a3c4134 --no-merges --oneline
3a3f707d5 Reland "Allow specification of std::functions as native entrypoints from Dart code." (flutter/engine#8329)
d4275d9ee Roll src/third_party/skia 576eb87a2d2d..99ccc0ca87e6 (5 commits) (flutter/engine#8328)
3a415c4f1 Map glfw into third_party, and roll buildroot (flutter/engine#8308)
ce9ea5869 [fuchsia] Disable FML_TRACE_COUNTER events to unblock roll (flutter/engine#8325)
48496588c Roll src/third_party/dart 8a92d2a8d9..991c9da720 (2 commits)
20c241ac3 Roll src/third_party/skia c476e5da4fef..576eb87a2d2d (7 commits) (flutter/engine#8324)
cadcf1c58 Roll src/third_party/dart f3fd1943fc..8a92d2a8d9 (16 commits)
66141eb8e Roll src/third_party/skia d1c271bd39f0..c476e5da4fef (2 commits) (flutter/engine#8322)
e5b31cdd9 Roll src/third_party/skia cec20280b3fb..d1c271bd39f0 (3 commits) (flutter/engine#8321)
1daff5ce1 Roll src/third_party/skia bf341ae88c83..cec20280b3fb (3 commits) (flutter/engine#8320)
87db585ad Roll src/third_party/skia 45d5f702133e..bf341ae88c83 (2 commits) (flutter/engine#8316)
fd7d7fa5a Add a11y support for embedded iOS platform view (flutter/engine#8156)
f64ee01e1 Roll src/third_party/skia d2ca31218bc4..45d5f702133e (11 commits) (flutter/engine#8315)
f521df383 Fixed service isolate not being initialized correctly due to bad name (flutter/engine#8251)
80b825ce8 Roll src/third_party/dart 093c2909fe..f3fd1943fc (13 commits) (flutter/engine#8310)
7e77d5c48 Revert "Allow specification of std::functions as native entrypoints from Dart code. (#8309)" (flutter/engine#8312)
400a86a62 Allow specification of std::functions as native entrypoints from Dart code. (flutter/engine#8309)
51f23fedf [vulkan] Add FUCHSIA external sem/mem extensions
78de8dcb4 Enable lambda like native callbacks in tests and add support for custom entrypoints. (flutter/engine#8299)
2812c7db4 Roll src/third_party/skia 62fd6c411622..d2ca31218bc4 (9 commits) (flutter/engine#8307)
95f9134e9 Roll src/third_party/skia d90004516a63..62fd6c411622 (4 commits) (flutter/engine#8306)
358273bd2 Roll src/third_party/skia 33211b2c7a02..d90004516a63 (1 commits) (flutter/engine#8305)
2804057bf Roll src/third_party/skia 80dd599e91d0..33211b2c7a02 (1 commits) (flutter/engine#8303)
a673bbf6f Roll src/third_party/skia c5ee499f2c59..80dd599e91d0 (5 commits) (flutter/engine#8301)
d88037dc0 Roll src/third_party/dart fa74184b7a..093c2909fe (71 commits)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
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If the roll is causing failures, please contact the current sheriff (bmparr@google.com), and stop
the roller if necessary.

* Embedding new diarams for API docs: Container, ListView, Align.

* Moving the diagrams to be enclosed within the snippet windows.

* Fixed wording for the alt image text.

Include the platformViewId of PlatformViews in the semantics tree. The accessibility bridge in the engine can use this id to steal the semantics nodes from the actual platform view and stick them into Flutter's semantics tree.

It is the iOS PlatformView counter part of https://github.com/flutter/flutter/pull/28953. It reverts the change in https://github.com/flutter/flutter/pull/28953/commits/5b5d6e89ec50f8f51766fb778d0e244f183a5000 and https://github.com/flutter/flutter/pull/28953/commits/03fd797eb8955561c2654b51035175202a25da9d.

https://github.com/flutter/flutter/issues/29302

Unblock the engine roll that includes the Dart roll that removes `-c`.

Documented CupertinoSwitch.value that it can't be null and added an assertion value != null in the constructor.

Related issue: #12948

Documentation that explains a common use case seen in Github issues where users were surprised by TextFormField growth to accommodate validation messages.

Remove the additional top padding from CupertinoPageScaffold's MediaQuery when the navigation bar is opaque (as the padding was already consumed by the navigation bar).

Related Issue: #29136

Avoids an implicit downcast + crash in MouseTracker, since the last
pointer event can be a Move or Down event, in addition to Hover.

The UserAccountsDrawerHeader had a bug with the arrow rotating whenever setState was called on its parent. This change makes sure that we check that the state actually changed before allowing the animation to trigger.

Fixes #25801

* Adding linking between higher and lower level classes in the API Docs. ref:#22859

* Fixed links between classes.