* 9347c93fc Roll src/third_party/dart c8ed304e979a..3414b5167554 (52 commits) (flutter/engine#16362)

* 16cd6f093 Roll fuchsia/sdk/core/mac-amd64 from 6h3IH... to Ke00Y... (flutter/engine#16360)

* 8c6cc65cd Fix runtime type errors when running with canvaskit (flutter/engine#16312)

* 677b563b9 Refactor of Vulkan GPUSurface code (flutter/engine#16224)

* 7ca44d339 Kill the test harness if any test exceeds a timeout. (flutter/engine#16349)

* 7f6149cbd Revert "Remove use of the deprecated AccessibilityNodeInfo boundsInPa… (flutter/engine#16355)

* 488f489bc Roll fuchsia/sdk/core/linux-amd64 from Tszo5... to VJv0H... (flutter/engine#16363)

* 7c9b11a80 Roll src/third_party/skia 71ce449d2814..2aee7d24da8f (5 commits) (flutter/engine#16364)

* 7e1d1440a Expose enable-service-port-fallback switch (flutter/engine#16366)

* 4cda916d5 Expose the dart kernel snapshot target and copied assets as a public dependency (flutter/engine#16266)

* 73c513041 Roll src/third_party/dart 3414b5167554..68e904e444dc (17 commits) (flutter/engine#16367)

* 1cd8f3b1a Fix and consolidate wstring conversion utils (flutter/engine#16342)

* b98a39e0b Add docs (flutter/engine#16368)

* e3e6de2ae Roll buildroot to c44791c89d2b51bfce864ab2cf5228d41ece1fcc (flutter/engine#16371)

* e24ec598e Fuchsia a11y actions (flutter/engine#16321)

* d8400c9cc Roll src/third_party/skia 2aee7d24da8f..14d64afaa8a3 (10 commits) (flutter/engine#16374)

* eeabd4d86 Roll src/third_party/dart 68e904e444dc..48808f7dce81 (17 commits) (flutter/engine#16377)

* 22b994c9c Roll fuchsia/sdk/core/mac-amd64 from Ke00Y... to ubThi... (flutter/engine#16378)

* 0471f44e9 Roll src/third_party/skia 14d64afaa8a3..6c9b1fd6663e (7 commits) (flutter/engine#16380)

* 852d8244c Roll src/third_party/dart 48808f7dce81..34893faa6079 (7 commits) (flutter/engine#16381)

* 4aa2083cf Roll src/third_party/skia 6c9b1fd6663e..bc3307c395e2 (1 commits) (flutter/engine#16383)

* 036c370c3 Copied Apple's semantics for switches, made checkboxes the same. (flutter/engine#16211)

* c107969ec fix build_id logic for fuchsia symbols (flutter/engine#16397)

* 11b770489 [fuchsia] Migrate flutter runner to use Present2 (flutter/engine#14162)

* 646ec3544 Update license output (flutter/engine#16379)

* 925c60b38 Fix Windows embedding issues caught by clang (flutter/engine#16369)

* 31bf3e110 Roll src/third_party/dart 34893faa6079..b3396cbdcae1 (36 commits) (flutter/engine#16422)

* 8f89bac4b [web] Fixes incorrect transform when context save and transforms are deferred. (flutter/engine#16412)

* f34bc65be use percent for golden diff rates; tighten the values (flutter/engine#16430)

* Remove usages of StackTraceMapper

This class will be replaced with a function type in `test_api`, clean up
usages ahead of time.

In `build_script.dart` the only reference to `StackTraceMapper` is in
the `browser_test.dart` file, but since nothing would call
`setStackTraceMapper` from that import it should be safe to remove the
definition. After reading a serialized mapper from the
`test.browser.mapper` channel, it was ignored.

In `flutter_web_platform.dart` we only were reading from `_mappers`,
never putting values in, so we can remove it entirely. The `load()`
function was never called with a `mapper` argument.

This reverts commit 3aa7a800.

This reverts commit 868b0e6d.

provide Guidance for MultiChildRenderObjectWidget implementations

* Revert "Revert "install goldctl in docker build (#46640)" (#50088)"

This reverts commit 0299398d.

This is to remove the flakiness associated with running those tests on
ios/13 when they always fail.

Context:
https://github.com/flutter/flutter/issues/49635