Fixes https://github.com/flutter/flutter/issues/36789
Fixes https://github.com/flutter/flutter/issues/37000

https://github.com/flutter/flutter/issues/36524
https://github.com/flutter/flutter/issues/24600

getTransformTo now includes ancestor in the transform it returns, except
for if ancestor is the root view, ensuring that the transform remains in
logical pixel space.

* Remove the identity() function.
* Make _flattenMap private.
* Don't bother with ungrowable lists.

In another change (#37646), I want to test that a test fails and
prints expected output.  I didn't see an existing way to do that, so
I modified `_runFlutterTest` and `runCommand` to allow capturing the
output.  Currently capturing and printing output are mutually
exclusive since we don't need both.

Some awkward bits:
* There already exists a `runAndGetStdout` function that is very
  similar to `runCommand`, and this change makes the conceptual
  distinction more confusing.

* `runFlutterTest` has multiple code paths for different
  configurations.  I don't understand what the different paths are
  for, and I added output checking only along one of them.

git@github.com:flutter/engine.git/compare/5d3012a1bb9d...cf6648313df8

git log 5d3012a1bb9d..cf6648313df8 --no-merges --oneline
2019-08-15 jason-simmons@users.noreply.github.com Remove the output directory prefix from the Android engine JAR filename (flutter/engine#11015)
2019-08-15 inthroxify@users.noreply.github.com Fix flutter/flutter #34791 (flutter/engine#9977)

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The update is copied from an update we made to a Google-internal
client: cl/260202900

The update will save 1 shader compilation.

This should help solve our regression:
https://github.com/flutter/flutter/issues/31203

More regressions on iOS might be introduced later by
https://github.com/flutter/engine/pull/9813#issuecomment-520039890

Unfortunately, we didn't rebase our benchmarks so such regressions
were not detected.

Hence to fully solve https://github.com/flutter/flutter/issues/31203,
we might need to revert some change in
https://github.com/flutter/engine/pull/9813 to make iOS shader warm-up
happen on the GPU thread again.

Add an autofocus parameter to widgets which use Focus widget internally, and update related docs.

This will allow developers to request that a particular widget be automatically focused when shown.

PlatformViewLink, handling creation of the PlatformViewSurface and dispose PlatformViewController (#37703)

* link

* review fixes

* review fixes

* remove extra line

git@github.com:flutter/engine.git/compare/f8e7453f1106...5d3012a1bb9d

git log f8e7453f1106..5d3012a1bb9d --no-merges --oneline
2019-08-15 bkonyi@google.com Roll src/third_party/dart e35e8833ee..cae08c6813 (28 commits)
2019-08-15 skia-flutter-autoroll@skia.org Roll src/third_party/skia f3f50099533d..e30a485a68c9 (2 commits) (flutter/engine#11022)
2019-08-15 skia-flutter-autoroll@skia.org Roll src/third_party/skia 319fd3d7bcb4..f3f50099533d (4 commits) (flutter/engine#11021)

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On Flutter HHH buildbot some operations that over a second: 4 digits for milliseconds, rather than 3 that are currently allowed.

* [Material] Add splashColor param to FAB and FAB ThemeData

git@github.com:flutter/engine.git/compare/426ea8dba6ea...f8e7453f1106

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2019-08-15 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from pCY3J... to _fvZN... (flutter/engine#11020)
2019-08-15 skia-flutter-autoroll@skia.org Roll src/third_party/skia c061d31c2415..319fd3d7bcb4 (9 commits) (flutter/engine#11018)
2019-08-15 bkonyi@google.com Roll src/third_party/dart e35e8833ee..e35e8833ee (0 commits)

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git@github.com:flutter/engine.git/compare/4c4c9997780a...426ea8dba6ea

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2019-08-15 chris@bracken.jp Fix gn breakage on non-Fuchsia macOS host builds (flutter/engine#11019)
2019-08-15 chris@bracken.jp Fix gn breakage on Fuchsia macOS host builds (flutter/engine#11016)

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4c4c99977 On iOS report the preferred frames per second to tools via service protocol. (flutter/engine#11006) (#38595)


git@github.com:flutter/engine.git/compare/5e155c6c2d35...4c4c9997780a

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2019-08-14 chinmaygarde@google.com On iOS report the preferred frames per second to tools via service protocol. (flutter/engine#11006)

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git@github.com:flutter/engine.git/compare/c5e30553cd1a...5e155c6c2d35

git log c5e30553cd1a..5e155c6c2d35 --no-merges --oneline
2019-08-14 xiao@xster.net some drive-by docs while I was reading the embedding classes (flutter/engine#9341)
2019-08-14 jason-simmons@users.noreply.github.com Initialize the engine in the running state to match the animator's default state (flutter/engine#11011)
2019-08-14 liyuqian@google.com Trace RasterCacheResult::Draw (flutter/engine#11004)
2019-08-14 stuartmorgan@google.com Rename macOS FLE* classes to Flutter* (flutter/engine#11010)
2019-08-14 james@clarkezone.net [Windows] Alternative Windows shell platform implementation (flutter/engine#9835)

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c5e30553c Roll src/third_party/skia 735f1d2f0208..c061d31c2415 (17 commits) (flutter/engine#11008) (#38592)


git@github.com:flutter/engine.git/compare/c96f3536f316...c5e30553cd1a

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git@github.com:flutter/engine.git/compare/4f00cb745c28...c96f3536f316

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2019-08-14 dnfield@google.com Revert "Update README.md (#11007)" (flutter/engine#11009)
2019-08-14 dnfield@google.com Update README.md (flutter/engine#11007)
2019-08-14 bkonyi@google.com Roll src/third_party/dart c4727fddf4..e35e8833ee (1 commits)
2019-08-14 dnfield@google.com Drop firebase test from Cirrus (flutter/engine#11005)

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git@github.com:flutter/engine.git/compare/cdaf44265b74...4f00cb745c28

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2019-08-14 dnfield@google.com Add script for running ios Tests on simulator (flutter/engine#10999)
2019-08-14 jason-simmons@users.noreply.github.com Avoid dynamic lookups of the engine library's symbols on Android (flutter/engine#11001)

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* Add a smoke test to test every commit on a Catalina host.
* Also add a hot-reload test.

Related issue: #36290.

git@github.com:flutter/engine.git/compare/76a33268f5fc...cdaf44265b74

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2019-08-14 jason-simmons@users.noreply.github.com Remove a tracing macro with a dangling pointer (flutter/engine#11002)

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76a33268f Roll src/third_party/skia 5f5a481ae1a9..735f1d2f0208 (7 commits) (flutter/engine#11000) (#38559)


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