https://github.com/flutter/engine/compare/75950dc280d5...230dfeed79ed

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2023-09-26 godofredoc@google.com Prepare fuchsia script to coexist with v1 and v2 of fuchsia builders. (flutter/engine#46126)
2023-09-26 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from uY9WEf2tJxa1Hpp4v... to a56c8yPp4DDlj_Qbl... (flutter/engine#46285)

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https://github.com/flutter/engine/compare/6bf8067392cf...75950dc280d5

2023-09-26 skia-flutter-autoroll@skia.org Roll Dart SDK from 216b25f9ea6f to 7c749713c688 (1 revision) (flutter/engine#46284)
2023-09-25 bdero@google.com [Impeller] Support applying color filters on the CPU for the RRect fast path. (flutter/engine#46281)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 00e4d00021a7 to b961fc353715 (6 revisions) (flutter/engine#46280)
2023-09-25 jonahwilliams@google.com [Impeller] Dont blow away coverage hint on advanced blends. (flutter/engine#46219)

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This measures the wall clock time between a new frame being scheduled in dart code to the Vsync callback in the engine

It's an important source of lag which isn't shown in the top-level UI / Build time graphs, and can correlate with "invisible" missed/non-scheduled frames

I had to change a few unrelated timings in the test, it was only passing based on luck of sort order, and broke when I added more entries to the timeline.

Part of #129150

https://github.com/flutter/engine/compare/3f606570ac7c...6bf8067392cf

2023-09-25 54558023+keyonghan@users.noreply.github.com Restore goma from rbe before 3.16 branching (flutter/engine#46272)
2023-09-25 bkonyi@google.com Add package:tar to DEPS to fix broken 3H configurations (flutter/engine#46273)
2023-09-25 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from SNqQGAfjWL3PbUABh... to we5owZaebdO_3kyjz... (flutter/engine#46270)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from a19a325cd670 to 00e4d00021a7 (6 revisions) (flutter/engine#46269)
2023-09-25 jonahwilliams@google.com [Impeller] fallback to position data if texture coordinates are undefined. (flutter/engine#46264)
2023-09-25 ian@mckellar.org fuchsia: Update FIDL for unknown interactions (flutter/engine#45773)
2023-09-25 jonahwilliams@google.com [Engine] use QoS classes in iOS engine. (flutter/engine#46265)
2023-09-25 jonahwilliams@google.com Revert "Switch goma to reclient for Linux clang_tidy targets (#45898)" (flutter/engine#46266)

Also rolling transitive DEPS:
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https://github.com/flutter/engine/compare/1ae3d20332f0...3f606570ac7c

2023-09-25 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Switch goma to reclient for Linux clang_tidy targets" (flutter/engine#46267)
2023-09-25 43759233+kenzieschmoll@users.noreply.github.com Add description to assert in `history.dart` (flutter/engine#46072)
2023-09-25 54558023+keyonghan@users.noreply.github.com Switch goma to reclient for Linux clang_tidy targets (flutter/engine#45898)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from e16a9b5b2c48 to a19a325cd670 (6 revisions) (flutter/engine#46261)
2023-09-25 skia-flutter-autoroll@skia.org Roll Dart SDK from 692273b46610 to 216b25f9ea6f (6 revisions) (flutter/engine#46260)
2023-09-25 54558023+keyonghan@users.noreply.github.com Switch goma to reclient for Linux fuchsia/unopt/android_aot (flutter/engine#45899)

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In our CocoaPods doctor check, if the version of CocoaPods is found to
be too low, rather than emitting a link to the install instructions,
emit a link to the upgrade instructions.

Since this check operates on CocoaPodsStatus, an enum, swtich to using a
case statement and cover all cases.


## Pre-launch Checklist

- [X] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [X] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
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we expect every widget to implement].
- [X] I signed the [CLA].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [X] I updated/added relevant documentation (doc comments with `///`).
- [X] I added new tests to check the change I am making, or this PR is
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In the FormField widget, if a validator is initially set (and validation fails), then subsequently the validator is set to null, the form incorrectly retains its error state. This is not expected behavior as removing the validator should clear any validation errors.

[Velocity Tracker] Fix: Issue 97761: Flutter Scrolling does not match iOS; inadvertent scrolling when user lifts up finger (#132291)

## Issue

**Issue:** https://github.com/flutter/flutter/issues/97761

https://github.com/flutter/flutter/assets/1863934/53c5e0df-b85a-483c-a17d-bddd18db3aa9

## The Cause:

The bug is very simple to understand - `velocity_tracker.dart` **only adds new samples while your finger is moving**.

**Therefore**, if you move your finger quickly & (important) stop suddenly with no extra movement, the last 3 samples will all be > 0 dy. Regardless of how long you wait, you will get movement when you lift up your finger.

**Logs from velocity_tracker.dart:**
Notice: all 3 `_previousVelocityAt` are `dy > 0` despite a 2 second delay since the last scroll
```
// start moving finger
flutter: addPosition dy:-464.0
flutter: addPosition dy:-465.0
flutter: addPosition dy:-466.0
flutter: addPosition dy:-467.0
flutter: addPosition dy:-468.0
flutter: addPosition dy:-469.0
flutter: addPosition dy:-470.0
// stop moving finger here, keep it still for 2 seconds & lift it up
flutter: _previousVelocityAt(-2) samples(-467.0, -468.0)) dy:-176.772140710624
flutter: _previousVelocityAt(-1) samples(-468.0, -469.0)) dy:-375.0937734433609
flutter: _previousVelocityAt(0) samples(-469.0, -470.0)) dy:-175.71604287471447
flutter: primaryVelocity DragEndDetails(Velocity(0.0, -305.5)).primaryVelocity
flutter: createBallisticSimulation pixels 464.16666666666663 velocity 305.4699824197211
```

## The Fix

**There are 3 options to fix it:**
A. sample uniformly *per unit time* (a larger more risky change, hurts battery life)
B. consider elapsed time since the last sample. If greater than X, assume no more velocity. (easy & just as valid)
C. similar to B, but instead add "ghost samples" of velocity zero, and run calculations as normal (a bit tricker, of dubious benefit imo)

**For Option B I considered two approaches:**
1. _get the current timestamp and compare to event timestamp._  This is tricky because events are documented to use an arbitrary timescale & I wasn't able to find the code that generates the timestamps. This approach could be considered more.
2. _get a new timestamp using Stopwatch and compare now vs when the last sample was added._ This is the solution implemented here.  There is a limitation in that we don't know when addSamples is called relative to the event. But, this estimation is already on a very low latency path & still it gives us a *minimum* time bound which is sufficient for comparison. 

**This PR chooses the simplest of the all solutions. Please try it our yourself, it completely solves the problem 😀** Option _B.1_ would be a nice alternative as well, if we can define and access the same timesource as the pointer tracker in a maintainable simple way.

## After Fix

https://github.com/flutter/flutter/assets/1863934/be50d8e7-d5da-495a-a4af-c71bc541cbe3

fixes https://github.com/flutter/flutter/issues/135144

https://github.com/flutter/engine/compare/2c4c1108aa87...1ae3d20332f0

2023-09-25 54558023+keyonghan@users.noreply.github.com Switch goma to reclient for Linux host engine targets (flutter/engine#45884)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 7a49397a02b4 to e16a9b5b2c48 (1 revision) (flutter/engine#46258)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 569a30fbdbdf to 7a49397a02b4 (2 revisions) (flutter/engine#46257)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 31ceb1669d1c to 569a30fbdbdf (1 revision) (flutter/engine#46256)

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https://github.com/flutter/packages/compare/98ebcd3d9c05...e548ae1d2045

2023-09-23 49699333+dependabot[bot]@users.noreply.github.com Bump github/codeql-action from 2.21.7 to 2.21.8 (flutter/packages#4952)
2023-09-23 engine-flutter-autoroll@skia.org Manual roll Flutter from 89365041 to f92884c7 (48 revisions) (flutter/packages#4985)
2023-09-22 geral.sbi2@gmail.com [image_picker_android] check if data from result is empty when picking a single img or video (flutter/packages#4836)
2023-09-22 me@nils.re [camera_android] Removes usage of `_ambiguate` method in tests (flutter/packages#4948)
2023-09-22 49699333+dependabot[bot]@users.noreply.github.com [sign_in]: Bump com.google.android.gms:play-services-auth from 20.6.0 to 20.7.0 in /packages/google_sign_in/google_sign_in_android/android (flutter/packages#4841)

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https://github.com/flutter/engine/compare/e6d3bac5c723...2c4c1108aa87

2023-09-25 49699333+dependabot[bot]@users.noreply.github.com Bump archive from 3.3.9 to 3.4.2 in /lib/web_ui (flutter/engine#46253)

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Reverts flutter/flutter#135372

https://github.com/flutter/engine/compare/e1c1022c2d6d...e6d3bac5c723

2023-09-25 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from VKAiabs4VzJ1Py-oA... to uY9WEf2tJxa1Hpp4v... (flutter/engine#46252)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from b8bc0c080aa8 to 31ceb1669d1c (1 revision) (flutter/engine#46249)

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https://github.com/flutter/engine/compare/3ea1174ecfaa...e1c1022c2d6d

2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 983f42f4c76b to b8bc0c080aa8 (1 revision) (flutter/engine#46247)
2023-09-25 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from 0Jl20zAW45rRsTNEu... to SNqQGAfjWL3PbUABh... (flutter/engine#46246)

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https://github.com/flutter/engine/compare/2daf5e7bb249...3ea1174ecfaa

2023-09-25 zanderso@users.noreply.github.com In run_tests.py, separate Dart package unit tests from other tests (flutter/engine#46232)
2023-09-24 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from SqWjDvrDsMfiisUoA... to VKAiabs4VzJ1Py-oA... (flutter/engine#46241)
2023-09-24 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from W1uZC0_FbXyoCmwJ1... to 0Jl20zAW45rRsTNEu... (flutter/engine#46240)
2023-09-24 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from M-fNM9YP2Lpc8Y_Dj... to SqWjDvrDsMfiisUoA... (flutter/engine#46239)

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Goden tests are easier to understand than `paints..` since the toolbar has a relatively complex path, and this should make PRs that make visual changes easier to review. 

The current goldens don't look correct since I messed up the y offset of the tip of the arrow when the arrow is pointing up. Should be fixed in https://github.com/flutter/flutter/pull/133386

Reverts flutter/flutter#135373

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https://github.com/flutter/engine/compare/ee27600dfbe2...2daf5e7bb249

2023-09-24 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from de4D1aoqF6LBk18Rd... to W1uZC0_FbXyoCmwJ1... (flutter/engine#46238)

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}
-->
The test has been passing for [50 consecutive runs](https://data.corp.google.com/sites/flutter_infra_metrics_datasite/flutter_check_test_flakiness_status_dashboard/?p=BUILDER_NAME:%22Mac_ios%20very_long_picture_scrolling_perf_ios__e2e_summary%22).
This test can be marked as unflaky.

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Mac_ios animated_advanced_blend_perf_ios__timeline_summary"
}
-->
The test has been passing for [50 consecutive runs](https://data.corp.google.com/sites/flutter_infra_metrics_datasite/flutter_check_test_flakiness_status_dashboard/?p=BUILDER_NAME:%22Mac_ios%20animated_advanced_blend_perf_ios__timeline_summary%22).
This test can be marked as unflaky.

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Mac_ios static_path_tessellation_perf_ios__timeline_summary"
}
-->
The test has been passing for [50 consecutive runs](https://data.corp.google.com/sites/flutter_infra_metrics_datasite/flutter_check_test_flakiness_status_dashboard/?p=BUILDER_NAME:%22Mac_ios%20static_path_tessellation_perf_ios__timeline_summary%22).
This test can be marked as unflaky.

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_android platform_channels_benchmarks"
}
-->
Issue link: https://github.com/flutter/flutter/issues/135105

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_android flutter_gallery__start_up_delayed"
}
-->
Issue link: https://github.com/flutter/flutter/issues/134631

Marks Linux_android opacity_peephole_grid_of_alpha_savelayers_perf__e2e_summary to be flaky (#135119)

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_android opacity_peephole_grid_of_alpha_savelayers_perf__e2e_summary"
}
-->
Issue link: https://github.com/flutter/flutter/issues/135118

https://github.com/flutter/engine/compare/614859053262...ee27600dfbe2

2023-09-23 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from PCEkaltiQ-iEKlmEj... to M-fNM9YP2Lpc8Y_Dj... (flutter/engine#46231)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from PCEkaltiQ-iE to M-fNM9YP2Lpc

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jonahwilliams@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

https://github.com/flutter/engine/compare/564480337eae...614859053262

2023-09-23 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from M9rDyhmn7VY4iTxzQ... to de4D1aoqF6LBk18Rd... (flutter/engine#46229)
2023-09-23 ychris@google.com [ios] Fix default assets url (flutter/engine#46214)
2023-09-23 skia-flutter-autoroll@skia.org Roll Skia from 15ccdeaba011 to 983f42f4c76b (1 revision) (flutter/engine#46223)
2023-09-23 chillers@google.com Revert "[Impeller] fail if software backend is chosen and Impeller is enabled on iOS" (flutter/engine#46217)
2023-09-23 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from QcxgV9KlY7j3o3b4j... to PCEkaltiQ-iEKlmEj... (flutter/engine#46221)
2023-09-22 jonahwilliams@google.com [Impeller] dont treat non-rects as rects. (flutter/engine#46218)
2023-09-22 skia-flutter-autoroll@skia.org Roll Skia from e9358f92110c to 15ccdeaba011 (1 revision) (flutter/engine#46216)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from QcxgV9KlY7j3 to PCEkaltiQ-iE
  fuchsia/sdk/core/mac-amd64 from M9rDyhmn7VY4 to de4D1aoqF6LB

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jonahwilliams@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

https://github.com/flutter/engine/compare/e4bfdc1a67de...564480337eae

2023-09-22 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from ZyajVWocCHVIuJkzM... to M9rDyhmn7VY4iTxzQ... (flutter/engine#46215)
2023-09-22 skia-flutter-autoroll@skia.org Roll Dart SDK from 4ddff752a6b0 to 692273b46610 (1 revision) (flutter/engine#46212)
2023-09-22 skia-flutter-autoroll@skia.org Roll Skia from 78fced84372d to e9358f92110c (4 revisions) (flutter/engine#46211)
2023-09-22 bdero@google.com [Impeller] Incorporate backdrop filters in subpass coverage. (flutter/engine#46130)

Also rolling transitive DEPS:
  fuchsia/sdk/core/mac-amd64 from ZyajVWocCHVI to M9rDyhmn7VY4

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jonahwilliams@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

PlatformViews have been supported without a custom engine build on iOS
for quite some time now, and are nearing support for macOS. Adds a link
to the website documentation covering creation of PlatformViews for iOS
and adds a TODO to do the same once the macOS PlatformView documentation
is ready.

Related: https://github.com/flutter/website/issues/9424

This PR moves tests running on Pixel 7 Pro that use Skia from staging to prod.