* Added '--check-for-remote-artifacts' option for Flutter Doctor.

This option takes a Flutter engine revision and issues HEAD requests to
determine whether or not artifacts for the provided engine revision are
available from cloud storage. This functionality is needed for the Dart
SDK autoroller to avoid creating a PR to roll the engine into the
framework while artifacts haven't finished building, which would cause
Cirrus tests to fail.

Previously there was no way to add this flag when searching for
Isolates.

One of the devicelab tests is broken after this commit - rolling to last known good commit while I investigate.

/cc @bkonyi

https://github.com/flutter/engine/compare/2f06a53a8d19...7352251ebec6

git log 2f06a53a8d19..7352251ebec6 --no-merges --oneline
7352251eb Roll src/third_party/skia 79c96811863f..797197a772b8 (1 commits) (flutter/engine#6683)
3dac47e4d Roll src/third_party/skia 38e4fd0c5654..79c96811863f (1 commits) (flutter/engine#6682)


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/a1d7cad70c81...2f06a53a8d19

git log a1d7cad70c81..2f06a53a8d19 --no-merges --oneline
2f06a53a8 Roll src/third_party/skia b53f1f46982d..38e4fd0c5654 (1 commits) (flutter/engine#6681)


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

https://github.com/flutter/engine/compare/162b2e98c036...a1d7cad70c81

git log 162b2e98c036..a1d7cad70c81 --no-merges --oneline
a1d7cad70 Fix inconsistent include syntax (flutter/engine#6680)
236661cd8 Roll src/third_party/skia 3b79aa3a5ad0..b53f1f46982d (13 commits) (flutter/engine#6679)
c4f50611d Roll buildroot to pick up Mac toolchain updates. (flutter/engine#6678)
ba8f6aa71 Handle Windows headers defining ERROR to 0 in log levels. (flutter/engine#6677)
505d2a923 Roll buildroot to pick up updates to custom toolchains. (flutter/engine#6674)
6c2a0b3a6 Undefine ERROR in platform_view_layer.cc (flutter/engine#6675)
55e12993a Update FlutterPlugin.h docs, suppress warning for older API (flutter/engine#6672)
f7970048d Attach and position embedded UIVIews (flutter/engine#6614)
df85722fa Plumb the iOS PlatformViewsController into flow. (flutter/engine#6603)
2bfb893cf iOS Embedding Refactor (flutter/engine#6447)


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* Revert "[H] Created a variant of InheritedWidget specifically for Listenables (#23393)"

This reverts commit 93132859.

* Revert "Fix a race condition in vmservice_test.dart (#23529)"

This reverts commit 5e7b0a36.

* Created a variant of InheritedWidget specifically for Listenables

* Add more documentation per review comments

Fixes https://github.com/flutter/flutter/issues/19273

This reverts commit 0f34f526.

Reverts flutter/flutter#23612 as it broke the following two bots:
1. platform_view__start_up
2. platform_interaction_test_ios

Merge on red to fix the rope.

https://github.com/flutter/engine/compare/162b2e98c036...6c2a0b3a6d93

git log 162b2e98c036..6c2a0b3a6d93 --no-merges --oneline
6c2a0b3a6 Undefine ERROR in platform_view_layer.cc (flutter/engine#6675)
55e12993a Update FlutterPlugin.h docs, suppress warning for older API (flutter/engine#6672)
f7970048d Attach and position embedded UIVIews (flutter/engine#6614)
df85722fa Plumb the iOS PlatformViewsController into flow. (flutter/engine#6603)
2bfb893cf iOS Embedding Refactor (flutter/engine#6447)


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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https://github.com/flutter/engine/compare/3236b49ceac5...162b2e98c036

git log 3236b49ceac5..162b2e98c036 --no-merges --oneline
162b2e98c Roll src/third_party/skia a944142412cd..3b79aa3a5ad0 (15 commits) (flutter/engine#6671)


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

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Revert "Run reload asynchronously so that multiple devices can reload in parallel. (#22693)" (#23598)

This reverts commit 709f54f4 as it seems to have broken two tests: flutter_gallery__back_button_memory, named_isolates_test.

https://github.com/flutter/engine/compare/dd791f36aca8...3236b49ceac5

git log dd791f36aca8..3236b49ceac5 --no-merges --oneline
3236b49ce Add missing includes (flutter/engine#6670)


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

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Fixes #21825

Allow heroes to fly across navigators and restrict Cupertino nav bars to per navigator by default (#23322)

* Run reload asynchronously so that multiple devices can reload in parallel.

Bug #1: These didn't work with directional alignments, due to an error
in the types of the constructor arguments.

Bug #2: Pretty sure RenderSizedOverflowBox never worked at all. As
soon as I wrote a test for it, the test showed that there was a
fundamental bug in its performLayout method: it didn't set
parentUsesSize, but it immediately tried to use the child's size.

* Improve documentation

* Potential performance win in hit testing

Rather than copying the list every time we access `path`, this just
exposes it as an `Iterable`. People who want to copy it can use
`toList()`.

(This isn't a breaking change since code that expects a `List` is
still going to get one.)

* Enforce the Oxford Comma.

https://github.com/flutter/engine/compare/6c2ade9fa2b5...9c46333e143b

git log 6c2ade9fa2b5..9c46333e143b --no-merges --oneline
9c46333e1 Roll src/third_party/skia 603c5da17491..e2fd74b48f6f (1 commits) (flutter/engine#6668)
d53c2be11 Roll src/third_party/skia 3f5b4ee4adfd..603c5da17491 (1 commits) (flutter/engine#6667)
074e67a7e Roll src/third_party/skia f5eaee917bb7..3f5b4ee4adfd (1 commits) (flutter/engine#6666)
7286e9acd Roll src/third_party/skia 2cf29ce4dbbf..f5eaee917bb7 (4 commits) (flutter/engine#6664)
3930b7c0d Roll src/third_party/skia a2272ef92640..2cf29ce4dbbf (8 commits) (flutter/engine#6661)


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

Documentation for the AutoRoller is here:
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If the roll is causing failures, please contact the current sheriff, who should
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* Register expression compiler in flutter test setting so that debugger expression evaluation is functional there.

* Fix analyzer lints

* [Material] Add custom shape parameter for Dialogs.

* [Material] Add custom shape parameter for Dialogs.

* Address Hans' first round comments.

* Address Hans' first round comments.

* Address Hans' Second round comments.

https://github.com/flutter/engine/compare/a6e816b2a67c...6c2ade9fa2b5

git log a6e816b2a67c..6c2ade9fa2b5 --no-merges --oneline
6c2ade9fa Update contributing.md for xcode_backend refactor notes (flutter/engine#6642)
69dced915 Dart SDK roll for 2018-10-25
3edf5fa82 Roll src/third_party/skia dfca8f6adb6b..a2272ef92640 (4 commits) (flutter/engine#6659)
cf75289b6 TextField is only a live region when it has input focus (flutter/engine#6649)


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

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* Mention new gitter channel

* Update CONTRIBUTING.md

For #21756

This reverts commit def1d805.

* Use Xcode build configurations to drive Flutter build mode

* Adds test and builder

* added test

https://github.com/flutter/engine/compare/2586e9412257...a6e816b2a67c

git log 2586e9412257..a6e816b2a67c --no-merges --oneline
a6e816b2a Roll src/third_party/skia 4f598e8c829a..dfca8f6adb6b (7 commits) (flutter/engine#6658)
ff0525f59 Add missing entry-points. (flutter/engine#6634)
08771fe14 Revert dart before engine commit 26e8840de5d6fe801378301dd36d54c92b25bd3b (flutter/engine#6656)
914551bfa Dart SDK roll for 2018-10-24
9f2e2ba7b Add/expose API for Paragraph.getBoxesForRange BoxHeightStyle and BoxWidthStyle. (flutter/engine#6644)
9669b70e1 Add an iOS PlatformViewsController for creating/disposing UIViews. (flutter/engine#6569)
6c2477bd2 fix setter for viewOpaque (flutter/engine#6653)
2bd8c94fc Roll src/third_party/skia a7682c8c73e4..4f598e8c829a (8 commits) (flutter/engine#6654)
e1e60933b Realize kernel asset mappings on a worker thread if one is available. (flutter/engine#6648)
d3874a9ca Roll src/third_party/skia 3b57279fd65a..a7682c8c73e4 (9 commits) (flutter/engine#6652)
3dddf4d5b Roll src/third_party/skia 8429c7930291..3b57279fd65a (2 commits) (flutter/engine#6650)
7b3bb62a8 Roll src/third_party/skia 3aca39df7b22..8429c7930291 (5 commits) (flutter/engine#6647)
26e8840de Dart SDK roll for 2018-10-23
9829c51a9 Roll src/third_party/skia b46c4d0925ad..3aca39df7b22 (12 commits) (flutter/engine#6643)


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* Revert "Revert "make LocalHistoryRoute a proper super-mixin (#23382)" (#23430)"

This reverts commit 3bbb3082.

This relands the LocalHistoryRoute change. The analyzer bug has been fixed.

* mark dartdocs as flaky