This reverts commit bf92d7f2.

* Add support for shadows in text.

* Use dart:ui Shadow as base class for Shadows

* Update lerp definition

* Roll engine 3ffa3629523..84fe4a9f7e24e4 - Text Shadows and update goldens for skia roll.

git log 50c2e69daff4e207c54e463d2304139985c7511c..32f417db0d566d354605305cb29c251276fa65ee --oneline --no-merges
32f417db0 Roll tonic to 077be256142ede39a271385907faadf4fcc62a4d. (#6541)
4ee77256c Revert "Roll Dart to 1f4dfce179c8f05c9e48759300a15e671b88cc10 (#6515)" (#6537)
964acafeb Roll src/third_party/skia 646d917d3c71..c6a17104ad68 (1 commits) (#6536)
d4bae4ca4 Roll src/third_party/skia 2b2c00f6ec36..646d917d3c71 (1 commits) (#6535)
ff93ccf47 Roll src/third_party/skia 681692726fc0..2b2c00f6ec36 (1 commits) (#6534)
a4161c895 Roll src/third_party/skia 23775a2e9736..681692726fc0 (1 commits) (#6532)
116072e46 Roll src/third_party/skia 7435f2553f53..23775a2e9736 (1 commits) (#6531)
ef0b0f6e9 Roll src/third_party/skia bc7a51e79c5b..7435f2553f53 (1 commits) (#6530)
f46b7b971 Roll src/third_party/skia b28db529c866..bc7a51e79c5b (1 commits) (#6529)
9033c3902 Roll src/third_party/skia 7e67041a1428..b28db529c866 (1 commits) (#6528)
e6887a412 Add missing imports for unicode/utf16.h (#6524)
1242f6dfe Roll src/third_party/skia d38382d060ca..7e67041a1428 (2 commits) (#6527)
a1bbea77c Add a no-op platform view layer. (#6505)
2bb3afad8 Roll src/third_party/skia 21bd60daa3f3..d38382d060ca (10 commits) (#6526)
75e875240 Fix the Mac embedder build (#6525)
436f9707b Add version check for dismissable (#6522)
7767c785b Provide a default GL function resolver in the embedder (#6523)
32841dd89 Case-insensitive matching of family names for custom fonts (#6519)
a9076c7e6 Roll src/third_party/skia 419709dbb167..21bd60daa3f3 (11 commits) (#6520)
f2e7441b5 An API for loading fonts from a buffer provided by the application (#6508)
05aac0f27 fix ResourceExtractor npe. (#6461)
cf5a2a145 Roll src/third_party/skia b27a9cf2f4a8..419709dbb167 (16 commits) (#6517)
84fe4a9f7 Re-revert invalid line height tests (#6516)
5f529566c Add support for text shadows (#6385)
e44c10c96 Reland "Share engine layers with the framework" (#6412) (#6468)
ba0449971 Roll Dart to 1f4dfce179c8f05c9e48759300a15e671b88cc10 (#6515)

TextTheme.apply was incorrectly applying displayColor to the TextTheme's headline, title, subhead, body1, and body2 TextStyle colors. In all cases it should have been bodyColor.

Users can set `PaintingBinding.decodedCacheRatioCap` to control the max
amount of memory used per image to avoid decoding frames each animation
loop.

This depends on flutter/engine#6310.

Fixes #20998, and fixes #14344

Service extensions can only be activated in debug or profile mode, their code should never be included in release mode. This PR adds guards around all service extension registration calls that enable Dart's tree shaker to remove the extension's code in release mode, which reduces our binary size:

Android Snapshot (uncompressed): minus 127,384 Bytes (-124.40KB)
APK (compressed): minus 38,136 Bytes (-37.24KB)
iOS Snapshot (App.framework, uncompressed): 264,304 Bytes(-258.10KB)

For details: https://docs.google.com/document/d/13JlgvliCn5sWwT2K2SfDwD1NhEfxpJH9DCf22gZZru8/edit

**Benchmark Regressions:** This PR may cause benchmarks to regress because it may change the timing of GC. If you notice a benchmark regression **please note down the exact set of benchmarks that regressed on this PR** and then feel free to revert. I will follow-up with a PR that forces a GC before the effected benchmarks run to get a clean baseline before re-applying this PR.

This reverts commit 80f80ab0.

Goldens updated due to Skia AA changes. We previously also made a mistake by having a golden test run on MacOS.

git log 3ffa36295234..50c2e69da --no-merges --oneline
50c2e69da Roll src/third_party/skia 1b62fad4b188..b27a9cf2f4a8 (1 commits) (flutter/engine#6514)
8757bf2a1 Roll src/third_party/skia 05caa69a3f5a..1b62fad4b188 (2 commits) (flutter/engine#6513)
c2fd10ad1 Roll src/third_party/skia 2a138544646d..05caa69a3f5a (1 commits) (flutter/engine#6512)

https://github.com/flutter/engine/compare/35ba11eb49e8...3ffa36295234

git log 35ba11eb49e8..3ffa36295234 --no-merges --oneline
3ffa36295 Add a callback for iOS when the first Flutter frame is rendered (flutter/engine#6135)


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, who should
be CC'd on the roll, and stop the roller if necessary.

https://github.com/flutter/engine/compare/daf4447a2eb2...35ba11eb49e8

git log daf4447a2eb2..35ba11eb49e8 --no-merges --oneline
35ba11eb4 Roll src/third_party/skia e7588323d586..2a138544646d (2 commits) (flutter/engine#6510)
f95bad849 Roll src/third_party/skia a631669e50a2..e7588323d586 (8 commits) (flutter/engine#6509)


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, who should
be CC'd on the roll, and stop the roller if necessary.

For G3 Roll:

* Revert "MaterialButton must honor its minWidth and height parameters (#22919)"

This reverts commit a0233233.

* Revert "Update uses of ButtonTheme.bar: pass along the current Theme's colorScheme (#22827)"

This reverts commit 655bf6a2.

* Revert "ButtonTheme.of().colorScheme defers to Theme (#22880)"

This reverts commit a590940e.

* Revert "Bring TextTheme into alignment with the current Material spec (#22330)"

This reverts commit 8bfb4b3e.

* Revert "Added ColorScheme, updated ThemeData, ButtonTheme, material buttons (#22013)"

This reverts commit eea3465a.

* Manual adjustments to fix reversion issues.

https://github.com/flutter/engine/compare/9cad7b663ee2...daf4447a2eb2

git log 9cad7b663ee2..daf4447a2eb2 --no-merges --oneline
daf4447a2 Reland "Allow raster caching any layer subtree (#6442)" (flutter/engine#6507)
c6e6da512 Revert "Allow raster caching any layer subtree (#6442)" (flutter/engine#6506)
6447418f7 Allow raster caching any layer subtree (flutter/engine#6442)


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, who should
be CC'd on the roll, and stop the roller if necessary.

* added test

https://github.com/flutter/engine/compare/22522c0b3e69...9cad7b663ee2

git log 22522c0b3e69..9cad7b663ee2 --no-merges --oneline
9cad7b663 Roll src/third_party/skia 9c37cd96e4c8..a631669e50a2 (12 commits) (flutter/engine#6501)
ee53ae1ea Roll src/third_party/skia 932759e9b414..9c37cd96e4c8 (1 commits) (flutter/engine#6498)


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, who should
be CC'd on the roll, and stop the roller if necessary.

* prefer_void_to_null in flutter_test

* fix CI

https://github.com/flutter/engine/compare/7ea8b9968dce...22522c0b3e69

git log 7ea8b9968dce..22522c0b3e69 --no-merges --oneline
22522c0b3 Roll src/third_party/skia f03d4eaa2487..932759e9b414 (2 commits) (flutter/engine#6497)


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, who should
be CC'd on the roll, and stop the roller if necessary.

https://github.com/flutter/engine/compare/f307c7fd070b...7ea8b9968dce

git log f307c7fd070b..7ea8b9968dce --no-merges --oneline
7ea8b9968 Roll src/third_party/skia 9835dd51b320..f03d4eaa2487 (1 commits) (flutter/engine#6496)


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, who should
be CC'd on the roll, and stop the roller if necessary.

https://github.com/flutter/engine/compare/daed2b7d61f3...f307c7fd070b

git log daed2b7d61f3..f307c7fd070b --no-merges --oneline
f307c7fd0 Remove VM options that are on by default now. (flutter/engine#6495)
61cf4c01f Pass scriptcode and variantcode to dart:ui Window. (flutter/engine#6493)
0eda0cfd4 Roll src/third_party/skia 04ac46135f23..9835dd51b320 (7 commits) (flutter/engine#6494)


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

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This attempts to re-land #22656.

There are two changes from the original:

I turned off wrapping completely when not sending output to a terminal. Previously I had defaulted to wrapping at and arbitrary 100 chars in that case, just to keep long messages from being too long, but that turns out the be a bad idea because there are tests that are relying on the specific form of the output. It's also pretty arbitrary, and mostly people sending output to a non-terminal will want unwrapped text.

I found a better way to terminate ANSI color/bold sequences, so that they can be embedded within each other without needed quite as complex a dance with removing redundant sequences.

As part of these changes, I removed the Logger.supportsColor setter so that the one source of truth for color support is in AnsiTerminal.supportsColor.

*     Turn on line wrapping again in usage and status messages, adds ANSI color to doctor and analysis messages. (#22656)

    This turns on text wrapping for usage messages and status messages. When on a terminal, wraps to the width of the terminal. When writing to a non-terminal, wrap lines at a default column width (currently defined to be 100 chars). If --no-wrap is specified, then no wrapping occurs. If --wrap-column is specified, wraps to that column (if --wrap is on).

    Adds ANSI color to the doctor and analysis output on terminals. This is in this PR with the wrapping, since wrapping needs to know how to count visible characters in the presence of ANSI sequences. (This is just one more step towards re-implementing all of Curses for Flutter. :-)) Will not print ANSI sequences when sent to a non-terminal, or of --no-color is specified.

    Fixes ANSI color and bold sequences so that they can be combined (bold, colored text), and a small bug in indentation calculation for wrapping.

    Since wrapping is now turned on, also removed many redundant '\n's in the code.

This adds configurable timeouts for the Dart VM. Due to some testing
machines running things quite slowly, this is becoming more necessary.

ButtonThemeData no longer requires a colorScheme. If colorScheme is null, ButtonTheme.of() will initialize it from the current Theme.

We decided that redefining the default for templates was premature. We're going to go back to having "module" in experimental land again, and we'll try again when we have the feature set fully baked.

This keeps the writing of the .metadata files, and writing the template type to them, because that was a good improvement, and there are still a bunch of added tests that improve our coverage.

Adds person related icons: `group` & `group_solid`, `person` & `person_solid` and `person_add` & `person_add_solid`.

* Remove new keyword from default template app

This is required in order to support "flutter run --profile"

* Allow passing a restart reason through to analytics

* Update to avoid overlaps with other code

* Remove TODO as this is the real live value

* Improve formatting + constant name

https://github.com/flutter/engine/compare/e68b85ae7ff4...bc6df5bc34dc

git log e68b85ae7ff4..bc6df5bc34dc --no-merges --oneline
bc6df5bc3 Roll buildroot to 2f0e56e63f92f1a8b80603e4b1c671fcf7b04feb (flutter/engine#6480)
2d199e85c Roll src/third_party/skia ef85d19100b1..42137de2b2b8 (7 commits) (flutter/engine#6479)
b6060d490 Missing dealloc method in FlutterEventChannel (flutter/engine#6464)


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

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If the roll is causing failures, please contact the current sheriff, who should
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Fixes https://github.com/flutter/flutter/issues/19507