This enables the manual tests to be built on a macOS desktop machine in desktop mode.

I created the macos directory by using flutter create --macos

git@github.com:flutter/engine.git/compare/0bfca375b3f5...efb7bf434f2c

git log 0bfca375b3f5..efb7bf434f2c --no-merges --oneline
2019-09-25 mklim@google.com Work around Samsung keyboard issue (flutter/engine#12432)


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Fixing the editable_text unit tests by clearing the log. Add a modification for also testing cached size. (#41300)

git@github.com:flutter/engine.git/compare/48ad8a08e45f...0bfca375b3f5

git log 48ad8a08e45f..0bfca375b3f5 --no-merges --oneline
2019-09-25 yjbanov@google.com Force exit felt tool on sigint, sigterm (flutter/engine#12443)
2019-09-25 skia-flutter-autoroll@skia.org Roll src/third_party/skia 6abaff3041a3..559ffe4a23ce (2 commits) (flutter/engine#12444)
2019-09-25 dworsham@google.com [fuchsia] Wire up OpacityLayer to Scenic (flutter/engine#11322)
2019-09-25 yjbanov@google.com delete golden files; switch to flutter/goldens (flutter/engine#12434)


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git@github.com:flutter/engine.git/compare/63949eb0fd98...48ad8a08e45f

git log 63949eb0fd98..48ad8a08e45f --no-merges --oneline
2019-09-25 devoncarew@google.com add dart:html, dart:js, and dart:js_util to the copy of the Dart SDK used for analysis (flutter/engine#12435)
2019-09-25 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from dmzjj... to worpw... (flutter/engine#12441)
2019-09-25 skia-flutter-autoroll@skia.org Roll src/third_party/skia 2da97da4b024..6abaff3041a3 (1 commits) (flutter/engine#12440)
2019-09-25 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from rEYHD... to avi05... (flutter/engine#12439)
2019-09-25 skia-flutter-autoroll@skia.org Roll src/third_party/skia 2137f90b9d98..2da97da4b024 (3 commits) (flutter/engine#12438)
2019-09-25 skia-flutter-autoroll@skia.org Roll src/third_party/skia f050422f3285..2137f90b9d98 (4 commits) (flutter/engine#12437)
2019-09-25 ditman@gmail.com Interpret negative radii as 0 in recording_canvas drawDRRect (flutter/engine#12431)


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Manual roll of the engine to 63949eb0fd982b27adc218364805913380af7411.

This reverts commit 8e231796.

This reverts commit 43932aa2.

* Implement system fonts system channel listener

Reverting the last two engine rolls, since the first one caused an issue in the devicelab on 32-bit iOS devices.

* Revert "Roll engine e7fd442410f4..953ac71749ee (18 commits) (#41163)"
* Revert "Roll engine b875c7a5ff56..e7fd442410f4 (19 commits) (#41127)"

* Carrying last size and transform information to TextInputConnection. Doing this we are making sure that the size/transform information from the previous connection will be removed, when connection changes.

* remove unused lastsize and lasttransform values

* Adding unit tests. Adressing comments.

There were four or five different implementations in various tests for sendFakeKeyEvent, which roughly all did the same thing. I was going to add yet another one, and decided that it needed to be generalized and centralized. This replaces those instances with something that just takes a LogicalKeyboardKey so that it's self-documenting, and can be used with multiple platforms.

This adds two functions to widget tester: sendKeyDownEvent and sendKeyUpEvent which simulate key up/down from a physical keyboard. It also adds global functions simulateKeyDownEvent and simulateKeyUpEvent that can be called without a widget tester. All are async functions protected by the async guard.

git@github.com:flutter/engine.git/compare/e7fd442410f4...953ac71749ee

git log e7fd442410f4..953ac71749ee --no-merges --oneline
2019-09-24 bkonyi@google.com Roll src/third_party/dart acac9ab11b..d53d355c6c (12 commits)
2019-09-24 skia-flutter-autoroll@skia.org Roll src/third_party/skia b4b1005d485f..c096654fa7c6 (1 commits) (flutter/engine#12415)
2019-09-24 skia-flutter-autoroll@skia.org Roll src/third_party/skia b3542d95da65..b4b1005d485f (6 commits) (flutter/engine#12414)
2019-09-24 ueman@users.noreply.github.com Write MINIMAL_SDK to exception message (flutter/engine#11345)
2019-09-23 franciscojma86@gmail.com Track "mouse leave" event (flutter/engine#12363)
2019-09-23 bkonyi@google.com Roll src/third_party/dart 77ff89b223..acac9ab11b (6 commits)
2019-09-23 mouad.debbar@gmail.com Don't send pointer events when the framework isn't ready yet (flutter/engine#12403)
2019-09-23 aam@google.com Update test to verify that secondary isolate gets shutdown before root isolate exits. (flutter/engine#12342)
2019-09-23 skia-flutter-autoroll@skia.org Roll src/third_party/skia 57ef68077574..b3542d95da65 (12 commits) (flutter/engine#12409)
2019-09-23 bkonyi@google.com Update --dart-vm-flags whitelist to include --write-service-info and --sample-buffer-duration (flutter/engine#12395)
2019-09-23 47866232+chunhtai@users.noreply.github.com Add system font change listener for windows (flutter/engine#12276)
2019-09-23 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from xPX7p... to kgFwg... (flutter/engine#12405)
2019-09-23 garyq@google.com Check for index bounds in RTL handling for trailing whitespace runs. (flutter/engine#12336)
2019-09-23 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from F-g18... to NY2A5... (flutter/engine#12407)
2019-09-23 bkonyi@google.com Roll src/third_party/dart f546362691..77ff89b223 (6 commits)
2019-09-23 50856934+nturgut@users.noreply.github.com Updating text field location in IOS as a pre-work for spellcheck (flutter/engine#12192)
2019-09-23 chinmaygarde@google.com Roll buildroot and remove toolchain prefix. (flutter/engine#12324)
2019-09-23 bkonyi@google.com Roll src/third_party/dart 94dd49cdb6..f546362691 (1 commits)


If this roll has caused a breakage, revert this CL and stop the roller
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