* 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)


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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)


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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

Fixes https://github.com/flutter/flutter/issues/23340

* Fixes gradle error: 'Could not find lint-gradle-api.jar' (#23095)

Updates gradle.

This reverts commit d07c09c9a1a8bd9a0860c579154974437da14024.

This reverts commit 70cb1318.

* Fix --pid-file not working for --machine + add to attach

Fixes #23201.

* Add tests for --pid-file in run+attach

* Revert "Remove duplicate code comment in flutter_gallery (#23422)"

This reverts commit 8039620b.

* Revert "Add explicit completed status trace to hot reload and restart commands (#23338)"

This reverts commit 245ef023.

This reverts commit a3e0b0ae.

This change broke the analyzer during the dartdoc step.

https://github.com/flutter/engine/compare/4c79e423dc6f...2586e9412257

git log 4c79e423dc6f..2586e9412257 --no-merges --oneline
2586e9412 Support all combinations of GetRectsForRange styles (flutter/engine#6591)
e78f86e01 Fix mac builds. Only Linux and Windows require default GL proc resolvers. (flutter/engine#6641)
52e48ab84 Fix Windows embedding. Appears that #6523 or #6525 introduced a bug for embedder scenarios causing the window native library to be incorrectly initialized and thus incapable of correctly resolving GL functions.  This change fixes that. (flutter/engine#6624)
c9197e449 Roll src/third_party/skia 25837bf17019..b46c4d0925ad (6 commits) (flutter/engine#6640)
324c21a72 Roll src/third_party/skia 1b07dffd979d..25837bf17019 (1 commits) (flutter/engine#6639)
5dfbc0a07 Roll src/third_party/skia e023ae7c5540..1b07dffd979d (1 commits) (flutter/engine#6638)
4a18dfffe Roll src/third_party/skia ff1aeb953faf..e023ae7c5540 (1 commits) (flutter/engine#6637)
427915e2f Allow FlutterViewController to specify whether its FlutterView is opaque (flutter/engine#6570)
20c805c97 Ensure that Scene::toImage renders texture backed images. (flutter/engine#6636)
25d0507d8 Roll buildtools to 5a9e1b3a0b84a2871f20f85fde665e54a894ba72 (flutter/engine#6633)
4f17d7ee7 Roll src/third_party/skia 327955b1ba19..ff1aeb953faf (13 commits) (flutter/engine#6635)
cdd592f5b Reland 'Pass null instead of 'none' locale' (flutter/engine#6632)
2cd89200c Roll src/third_party/skia b1a002e850e1..327955b1ba19 (12 commits) (flutter/engine#6631)
edfe02481 13771 - iOS dictation bug (flutter/engine#6607)
cadf4405b Roll src/third_party/skia b9998cdceec7..b1a002e850e1 (13 commits) (flutter/engine#6626)

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If the roll is causing failures, please contact the current sheriff, who should
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cdd592f5b Reland 'Pass null instead of 'none' locale' (#6632)
2cd89200c Roll src/third_party/skia b1a002e850e1..327955b1ba19 (12 commits) (#6631)
edfe02481 13771 - iOS dictation bug (#6607)
cadf4405b Roll src/third_party/skia b9998cdceec7..b1a002e850e1 (13 commits) (#6626)

This creates a custom dartdoc tool that will generate snippet blocks in our API docs that allow the user to copy easily to the clipboard, and will also embed the snippet code into a template to show it in a larger context with an app.

This PR adds the snippet tool, a template, and a couple of HTML skeleton files, one for snippets that are designed to be in an application setting, and one where it simply puts a nice container around existing snippets, making them easier to copy to the clipboard.