* Adding a setup function for hot restart that can be overwritten to perform any necessary initialization before a restart is started.

* Adding a test for setupHotRestart

* Removing local pubspec change

* Fixing some type annotation errors

* Responding to comments

* Merge

* Update goldens

This reverts commit edc16473.

Await stream cancellations before trying to complete

* Roll engine to 21c7d6a5da47165d076928fbe460badbbead24cd

flutter/engine@21c7d6a Revert "Add antiAlias and saveCount to clipPath and restore (#5638)"
flutter/engine@70dcbb5 Roll src/third_party/skia d818ebf4a317..9aa30c6ee0e5 (11 commits)
flutter/engine@ad42324 Roll src/third_party/skia a219419c9d76..d818ebf4a317 (2 commits)
flutter/engine@f2eb83a Roll src/third_party/skia 00d2e8ebcb13..a219419c9d76 (1 commits)
flutter/engine@0ec7669 Roll src/third_party/skia 8451daabb23d..00d2e8ebcb13 (1 commits)
flutter/engine@061e899 Support all keyboard actions. (#11344)
flutter/engine@bc6b250 Roll src/third_party/skia 34024a7c478c..8451daabb23d (1 commits)
flutter/engine@df4dffb Roll src/third_party/skia 75e69028956d..34024a7c478c (1 commits)
flutter/engine@d8770d4 Roll src/third_party/skia cf863fb9b446..75e69028956d (1 commits)
flutter/engine@b88a8b3 Roll src/third_party/skia b7b9d02ac020..cf863fb9b446 (1 commits)
flutter/engine@2261ccf [fuchsia] Update scenic lib path.
flutter/engine@4c4ef98 [fuchsia] Rename scenic_lib => scenic
flutter/engine@f0c21f3 Roll src/third_party/skia 184d408b646b..b7b9d02ac020 (7 commits)
flutter/engine@a2bf805 Add antiAlias and saveCount to clipPath and restore
flutter/engine@9e450d1 Roll src/third_party/skia c91fe3ab1c5d..184d408b646b (10 commits)
flutter/engine@e663996 Roll src/third_party/skia eb8f8106f38c..c91fe3ab1c5d (5 commits)
flutter/engine@fecd66f Roll src/third_party/skia 723b1f6ef941..eb8f8106f38c (1 commits)
flutter/engine@4466d61 Remove vmservice_io.main from entry points.
flutter/engine@f279dfe Roll src/third_party/skia 7e2327b133db..723b1f6ef941 (1 commits)
flutter/engine@a885bd4 Roll src/third_party/skia 24d18ced1ad7..7e2327b133db (6 commits)
flutter/engine@ad1bd47 Roll src/third_party/skia a1e5630183c1..24d18ced1ad7 (7 commits)
flutter/engine@ce06bba ensure a11y state is communicated back to flutter
flutter/engine@c54a57e Roll src/third_party/skia b1b87d9df81e..a1e5630183c1 (10 commits)
flutter/engine@a9e5354 Roll src/third_party/skia 385804514edf..b1b87d9df81e (6 commits)
flutter/engine@2006e7d Roll src/third_party/skia e97bb26893a1..385804514edf (1 commits)
flutter/engine@2942061 Roll src/third_party/skia e2e52e46ca63..e97bb26893a1 (1 commits)
flutter/engine@e378811 Roll src/third_party/skia 14de25dfc7c4..e2e52e46ca63 (2 commits)
flutter/engine@48cc8f2 Roll src/third_party/skia 551dc3e91143..14de25dfc7c4 (2 commits)
flutter/engine@00ddf13 libtxt: apply an offset to drawing operations instead of translating the canvas
flutter/engine@2c5647c Roll src/third_party/skia 059a9ab4bcd0..551dc3e91143 (5 commits)
flutter/engine@9e44004 Roll src/third_party/skia 45c9dab4c3ec..059a9ab4bcd0 (8 commits)
flutter/engine@fbb3436 Remove some unused code from the Android host
flutter/engine@36f3f95 Roll src/third_party/skia 37b7e4714558..45c9dab4c3ec (1 commits)
flutter/engine@57e2e0c Roll src/third_party/skia c421ca1d6e41..37b7e4714558 (2 commits)
flutter/engine@ce417e2 Roll src/third_party/skia 5b201e3b0ba8..c421ca1d6e41 (3 commits)
flutter/engine@05f5a18 Roll src/third_party/skia d47fe095cf88..5b201e3b0ba8 (6 commits)
flutter/engine@33b70e0 Roll src/third_party/skia 9c0ce41cf711..d47fe095cf88 (12 commits)
flutter/engine@7dab419 Roll src/third_party/skia d4b2adeaa929..9c0ce41cf711 (7 commits)
flutter/engine@d3fa01a Roll src/third_party/skia f46710802ad5..d4b2adeaa929 (1 commits)

This reverts commit 989f5741.

* fixed segmented control golden test

* fixed segmented control golden test

* added cursorWidth, cursorRadius

* added default value for cursorWidth based on Apple specs

* test default cursorWidth

* removed cursorHeight stuff

* added functionality to keep cursor from blinking

* cursor width and radius is configurable + tests

* changed goldens repo version in goldens.version

* working version of configurable cursor (erased debugKeepCursorOn)

* minor changes

* docs

* changed textfield test that was failing due to new default cursorwidth

* added default value of cursorwidth in RenderEditable

* only run golden file tests on Mac

* cursor tests

* the tests are actually there now

* weak warning fixed

* switching to Linux

* changed default cursorWidth: 2.0 -> 1.0

* assorted changes, including changing text field test

* re-paint -> re-layout when changing cursorWidth

* Upgrade to current LTS version of Node

The version of NPM with Node 6 is over a year old and frequently hangs trying to install Firebase tools.

* Temporarily comment out this condition so the install runs on Travis

* Revert "Temporarily comment out this condition so the install runs on Travis"

This reverts commit 74db9366b4b1b094369388ef50fb26f3b7fd3104.

* Pin to nodejs v8.1

* Include stdout/stderr in failure messages

Sometimes some of these tests unexpectedly fail with a non-zero exit code. This ensures stdout/stderr is included in the test failure message when this happens so that we can track down the issue.

* Remove redundant info about exit code

* Remove unnecessary indenting

The [markers] make it fairly clear so this just makes the test code noisy.

Fixes #18995.

This logic is described in the test as looking for a scroll ending
very close to a new page, but in fact its behavior is more like
"very close to a page to the right": if we're not very, very close
to any page, it will pick the page to the left, not an old page.

There's no reason this should be left-right asymmetrical.
Instead, pick the nearest page.

In practice, the case where this makes a difference never arises when
the scroll runs undisturbed to completion; but when the user taps on
the page to hold or drag, the scroll will be interrupted before it
gets within tolerance of a particular page, and this case does arise.

This fixes a glitch that is hard to trigger without time dilation,
but is quite conspicuous with it:

 * Open a tab view with at least 4 tabs, e.g. the Buttons screen
   of the gallery (with "Animate Slowly" on.)
 * Starting at tab 0, tap tab 2.
 * When the animation is nearly complete, tap the page a couple
   of times, as if to drag it around to scroll.  Then let the
   page view settle ballistically toward page 2.
 * Before it finishes, tap tab 3.
 * Suddenly page 1 fills the view, replacing page 2, before we
   scroll from there to page 3.

With this fix, the animation in the last step moves smoothly from
where we are when it starts onward to page 3.

Also:
 * Export TextInputAction from `text_field.dart` to parallel `TextInputType`.

Before a severe log would be raised when timeout happens. Now that
testing connections requires potentially running into a timeout, this
will cause failures when there shouldn't be any.

See https://github.com/flutter/flutter/pull/18881#discussion_r199285256

* Support all keyboard actions. (#11344)

Fixes #18829

Otherwise on Windows these will fail as an unsupported platform when things try to read defaultTargetPlatform in flutter apps.

This fixes #18727 

Goldens for flutter/flutter#18729

Our first step towards https://github.com/flutter/flutter/issues/18727