* Add didSendFirstFrameEvent service extension.

2940812ab Roll src/third_party/skia 1409ac718693..8f37ce5b9f2c (2 commits) (flutter/engine#7349) (#25978)

https://github.com/flutter/engine/compare/b1a9a6e79474...844c3274e6a1

git log b1a9a6e7947492b27c21688104d2d006d583094e..844c3274e6a1cd5a4651c46d26761b76ea837b34 --no-merges --oneline
844c3274e Roll src/third_party/skia 22451ccae544..1409ac718693 (2 commits) (flutter/engine#7348)
8ae205ccf Roll src/third_party/skia db0fdfbf107d..22451ccae544 (1 commits) (flutter/engine#7347)
e04cb414c Roll src/third_party/skia 247f03baeed9..db0fdfbf107d (1 commits) (flutter/engine#7345)
5f5316871 Roll src/third_party/skia 4f050fb81955..247f03baeed9 (1 commits) (flutter/engine#7344)
0e4a1afc3 Roll src/third_party/skia 8f42e2467cd9..4f050fb81955 (1 commits) (flutter/engine#7343)
a19b78ab6 Roll src/third_party/skia 9bc33b963844..8f42e2467cd9 (1 commits) (flutter/engine#7342)

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https://github.com/flutter/engine/compare/995e3247fe50...b1a9a6e79474

git log 995e3247fe500ff6e9981bd6e2409191c4f9a32a..b1a9a6e7947492b27c21688104d2d006d583094e --no-merges --oneline
b1a9a6e79 Roll src/third_party/skia 61b3d1d00057..9bc33b963844 (1 commits) (flutter/engine#7341)
571bf5c1e Roll src/third_party/skia 7b0f0149474a..61b3d1d00057 (1 commits) (flutter/engine#7340)
193cf3792 Roll src/third_party/skia 197b1f7900a2..7b0f0149474a (1 commits) (flutter/engine#7334)
8b35c97c1 Roll src/third_party/skia 0c1592291580..197b1f7900a2 (2 commits) (flutter/engine#7333)
544e5bcd2 Roll src/third_party/skia 3b0a332fd970..0c1592291580 (1 commits) (flutter/engine#7332)
d2eb6efeb Roll src/third_party/skia a5d2a9486fed..3b0a332fd970 (1 commits) (flutter/engine#7331)
e2ca868c3 Roll src/third_party/skia 3dc21675b05a..a5d2a9486fed (1 commits) (flutter/engine#7330)
cdc7cc8d3 Roll src/third_party/skia 739b760deaa6..3dc21675b05a (1 commits) (flutter/engine#7329)
e548f12e4 Roll src/third_party/skia aec8c7e280cb..739b760deaa6 (1 commits) (flutter/engine#7328)

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https://github.com/flutter/engine/compare/1bd9d41f8990...995e3247fe50

git log 1bd9d41f8990..995e3247fe50 --no-merges --oneline
995e3247f Roll src/third_party/skia f3e6b90461e4..aec8c7e280cb (1 commits) (flutter/engine#7326)
6f763fbad Minor refactoring of dynamic patching code. (flutter/engine#7325)
868dc047b Support loading flutter assets from dynamic patch (flutter/engine#7308)

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See https://github.com/flutter/flutter/issues/25855

https://github.com/flutter/engine/compare/f0a1d6f91d93...1bd9d41f8990

git log f0a1d6f91d93..1bd9d41f8990 --no-merges --oneline
1bd9d41f8 Roll src/third_party/skia 51eaa79d19b8..f3e6b90461e4 (5 commits) (flutter/engine#7323)
bf863786c Roll buildroot to pick up changes since the last roll: (flutter/engine#7322)
c716a21a2 Roll src/third_party/skia 7561dba7c145..51eaa79d19b8 (3 commits) (flutter/engine#7321)
189662feb Roll src/third_party/skia 3e7ba8fa7e7f..7561dba7c145 (1 commits) (flutter/engine#7320)
db5214d3d Roll src/third_party/skia acc763e8795c..3e7ba8fa7e7f (1 commits) (flutter/engine#7319)
0a0d61323 Changes since last dart roll: (flutter/engine#7316)

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```
f0a1d6f91 Roll src/third_party/skia 487132b82826..acc763e8795c (1 commits) (#7318)
f0dd6436c Recreate the overlay rendering surfaces if the GrContext was changed. (#7317)
245317a62  Reland "Only reject gestures to embedded UIViews when the framework sa (#7315)
be69b07cc Roll src/third_party/skia d2fa2eb59f2d..487132b82826 (1 commits) (#7314)
732ea7669 Allow dynamic patches without a patch number. (#7309)
20ee4e3e9 Revert "Only reject gestures to embedded UIViews when the framework says so. (#7307)" (#7313)
28e152f7e Roll src/third_party/skia cae020ae5f5f..d2fa2eb59f2d (3 commits) (#7312)
7c65290da Roll src/third_party/skia 31c1bf89657f..cae020ae5f5f (1 commits) (#7311)
180d8a7d9 Roll src/third_party/skia f6e963ef91c2..31c1bf89657f (1 commits) (#7310)
cc9c6702d Only reject gestures to embedded UIViews when the framework says so. (#7307)
2fb2b2729 Roll src/third_party/skia 3605fde88b2a..f6e963ef91c2 (1 commits) (#7306)
```

Unique patch numbers are mainly useful for canary and A-B testing, but otherwise complicate things and can now be omitted.

* Collect devfs stats for better analytics

* Fix fields initialization

* Fix lints

flutter/engine#7307 changes the engine side of embedded UIView to only
reject gestures when the framework sends a `rejectGesture` message, so
that gesture resolution can done after a touch sequence has ended (see
PR description for flutter/engine#7307 for more details).

This change makes the framework send a `rejectGesture` message to the
engine when a UiKitView rejects a gesture.

I'm planning to land this PR before the engine side change, so right now
it swallows the exception thrown if there is no engine implementation
for `rejectGesture` (which keeps us with the current behavior). After
this change lands I'll land the engine PR, and then clean up the part
that swallows the exception.

https://github.com/flutter/engine/compare/e75fad7ccead...9daf5c8d213a

git log e75fad7ccead..9daf5c8d213a --no-merges --oneline
9daf5c8d2 Roll src/third_party/skia f78b7ea945e5..3605fde88b2a (1 commits) (flutter/engine#7305)
798e96d9b Roll src/third_party/skia 212e9060ed29..f78b7ea945e5 (1 commits) (flutter/engine#7304)
7b379da03 Roll src/third_party/skia 5d77c200a8d9..212e9060ed29 (1 commits) (flutter/engine#7303)

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https://github.com/flutter/engine/compare/d8c5ec0e11b5...e75fad7ccead

git log d8c5ec0e11b5..e75fad7ccead --no-merges --oneline
e75fad7cc Roll src/third_party/skia 2772ea397e04..5d77c200a8d9 (1 commits) (flutter/engine#7302)
a64dd4b97 Roll src/third_party/skia 088b74e51314..2772ea397e04 (1 commits) (flutter/engine#7301)
4e9fb504e Roll src/third_party/skia 8be4b02b4c72..088b74e51314 (1 commits) (flutter/engine#7300)
787caecc7 Roll src/third_party/skia 481dd46cc368..8be4b02b4c72 (1 commits) (flutter/engine#7299)
c39589de6 Roll src/third_party/skia dc5863c4d665..481dd46cc368 (1 commits) (flutter/engine#7298)

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* Include cursor in textfield intrinsic width measurement

* Add cursorWidth assertion, add comment about assumed cursor width, and test null stepWidth

https://github.com/flutter/engine/compare/215ca1560088...d8c5ec0e11b5

git log 215ca1560088..d8c5ec0e11b5 --no-merges --oneline
d8c5ec0e1 Roll src/third_party/skia f16825ed3c71..dc5863c4d665 (1 commits) (flutter/engine#7297)
efb8a3f07 Roll src/third_party/skia 945a56644728..f16825ed3c71 (1 commits) (flutter/engine#7296)
67150a535 Roll src/third_party/skia 28bd882a1e40..945a56644728 (2 commits) (flutter/engine#7295)
3705a1ed3 Roll src/third_party/skia ea8900e74ea7..28bd882a1e40 (1 commits) (flutter/engine#7294)
943ecfc75 Roll src/third_party/skia 13654b20ce5b..ea8900e74ea7 (1 commits) (flutter/engine#7293)
7b12ae241 Roll src/third_party/skia 12a6d452b126..13654b20ce5b (1 commits) (flutter/engine#7292)
1fe7e1fde Roll src/third_party/skia c983480b117f..12a6d452b126 (1 commits) (flutter/engine#7291)
a8b0d263c Roll src/third_party/skia 2e40d9886402..c983480b117f (1 commits) (flutter/engine#7290)
c64f971e3 Roll src/third_party/skia 98a4e4a4135b..2e40d9886402 (1 commits) (flutter/engine#7289)
65420c264 Roll src/third_party/skia 2a0967383087..98a4e4a4135b (1 commits) (flutter/engine#7288)
770536ab6 Only overflow the cache for one required frame (flutter/engine#7048)
b6880bbc9 Roll src/third_party/skia 9803b8f1d197..2a0967383087 (16 commits) (flutter/engine#7285)

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Top left and top right for big FABs, and top left for mini FABs.

Also, some code cleanup.

* Renamed --save-compilation-trace to flutter run --train.
* Renamed --precompile=<file> to --compilation-trace-file=<file>.
* In dynamic mode, made JIT snapshot the default, instead of kernel file.

It's easier to run the android_views integration test this way, without
needing to worry if we have a local clone of the goldens repo or not.

We have a page on the Web page now.

https://github.com/flutter/engine/compare/6a9041853c4b...54a3577c0139

git log 6a9041853c4b..54a3577c0139 --no-merges --oneline
54a3577c0 Roll src/third_party/skia b03e024a4034..bdfe3a3ee9c3 (14 commits) (flutter/engine#7277)
ead76a4db Remove unused native function dumpCopmpilationTrace(). (flutter/engine#7276)
eaffc462a [License] Enable avoid_positional_boolean_parameters lint (flutter/engine#7275)
b07753bad [License] Sync analysis_options.yaml from framework (flutter/engine#7273)
233c100b6 [License] Enable always_require_non_null_named_parameters
f4b348f77 [License] Enable flutter_style_todos lint
48be433ce [License] Enable prefer_is_empty lint
bd648bad6 [License] Enable prefer_const_constructors lint
2b207a51c [License] Enable unnecessary_parenthesis lint
97ae27164 [License] Enable prefer_initializing_formals lint
c8f83fbea [License] Enable prefer_collection_literals lint
d120e15af [License] Enable prefer_void_to_null lint
e2ab3780a [License] Enable directives_ordering lint
5f2e6cd41 [License] Enable unnecessary_overrides lint
bd955d78a [License] Enable avoid_function_literals_in_foreach_calls lint
392df65f6 [License] Enable prefer_const_declarations lint
06e35912d [License] Enable prefer_final_fields lint
32423ef38 [License] Enable prefer_asserts_in_initializer_lists lint
4703a7f10 [License] Enable prefer_equal_for_default_values lint
1d7285bea [License] Enable empty_catches lint
68fadca0e [License] Enable unnecessary_this lint
c6f5e67cb [License] Enable prefer_single_quotes lint
cc51731d8 Clarify TextAffinity docs (flutter/engine#7238)

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