This adds the default shortcuts and actions for keyboard-based focus traversal of apps.

This list of shortcuts includes shortcuts for TAB, SHIFT TAB, RIGHT_ARROW, LEFT_ARROW, UP_ARROW, DOWN_ARROW, and the four DPAD keys for game controllers (because the DPAD produces arrow key events).

It doesn't yet include functionality for triggering a control (e.g. SPACE, ENTER, or controller buttons), because that involves restructuring some of the Flutter controls to trigger animations differently, and so will be done in another PR (#41220)

git@github.com:flutter/engine.git/compare/4651df4d35af...aa8fcbb65283

git log 4651df4d35af..aa8fcbb65283 --no-merges --oneline
2019-10-02 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from 7v4fg... to AGoPT... (flutter/engine#12745)
2019-10-02 gspencergoog@users.noreply.github.com Stop setting the accessibility text if a node has SCOPES_ROUTE set. (flutter/engine#12730)
2019-10-02 bkonyi@google.com Roll src/third_party/dart 431176ea26..98b286de21 (16 commits)
2019-10-02 skia-flutter-autoroll@skia.org Roll src/third_party/skia cf0a9a628490..a1ea0a96f490 (1 commits) (flutter/engine#12743)
2019-10-02 jiahaog@users.noreply.github.com Fix parameter naming in docs (flutter/engine#12732)
2019-10-02 iska.kaushik@gmail.com Update linux toolchain for fuchsia (flutter/engine#12742)
2019-10-02 skia-flutter-autoroll@skia.org Roll src/third_party/skia 1c934fade666..cf0a9a628490 (3 commits) (flutter/engine#12741)
2019-10-02 skia-flutter-autoroll@skia.org Roll src/third_party/skia 015c2feb1288..1c934fade666 (3 commits) (flutter/engine#12740)
2019-10-02 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from L_AEL... to LSKbP... (flutter/engine#12739)
2019-10-02 skia-flutter-autoroll@skia.org Roll src/third_party/skia 674f77a24b62..015c2feb1288 (1 commits) (flutter/engine#12738)
2019-10-02 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from Q4sFH... to 7v4fg... (flutter/engine#12737)
2019-10-02 bkonyi@google.com Roll src/third_party/dart cbf6a233fc..431176ea26 (1 commits)
2019-10-02 iska.kaushik@gmail.com [flutter_runner] Make rd and rx uniform (flutter/engine#12733)
2019-10-02 skia-flutter-autoroll@skia.org Roll src/third_party/skia 9e514a183b99..674f77a24b62 (1 commits) (flutter/engine#12734)
2019-10-01 bkonyi@google.com Roll src/third_party/dart 1103600280..cbf6a233fc (8 commits)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC liyuqian@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

* dont update last compiled time when compilation is rejected

* lets try flushing, thats a neat trick

* windows man

* Update hot_reload_test.dart

* Update hot_reload_test.dart

* Update devfs.dart

* Update hot_reload_test.dart

* Update hot_reload_test.dart

* add test that verifies when compile is good that time is updated

* Update devfs_test.dart

Adds an ActivateAction to controls that use InkWell. Make InkWell host the Focus for those controls, and add the top level binding to the ENTER key. This will make it possible to trigger a button using the enter key, and to get an ink response when the button is triggered.

This is a breaking change because it moves the Focus widget into the InkWell. If you have a component that uses the InkWell directly and you used to wrap that InkWell in a Focus widget to give it its notion of focus, it will now not look for that Focus ancestor for its focus state anymore. In order to control focus on the InkWell, you need to give it a FocusNode directly, via the new focusNode parameter. This should not affect users of widgets like OutlineButton or FloatingActionButton and the like, since those have been modified in this PR.

git@github.com:flutter/engine.git/compare/9e6314d348f9...4651df4d35af

git log 9e6314d348f9..4651df4d35af --no-merges --oneline
2019-10-01 skia-flutter-autoroll@skia.org Roll src/third_party/skia 1e9112fbb472..9e514a183b99 (5 commits) (flutter/engine#12729)
2019-10-01 ychris@google.com Remove unused imports in the scenario app (flutter/engine#12728)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC cbracken@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

This reverts commit 19c08e89.

The attempted revert doesn't fix the problem, so we'll reland.

This reverts c9d920f3 so that we can attempt to fix the build. The build dashboard clearly shows that things started failing at this change, although it's not totally clear that it is the cause: tests succeed locally.

If it doesn't fix things we can re-land this.

git@github.com:flutter/engine.git/compare/5c428d924790...9e6314d348f9

git log 5c428d924790..9e6314d348f9 --no-merges --oneline
2019-10-01 bkonyi@google.com Roll src/third_party/dart 998f1efbe9..1103600280 (6 commits)
2019-10-01 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from 3Axx8... to L_AEL... (flutter/engine#12726)
2019-10-01 ychris@google.com Reland "Add iOS platform view mutation XCUITests to the scenario app(#11652)" (flutter/engine#12707)
2019-10-01 skia-flutter-autoroll@skia.org Roll src/third_party/skia a7914a872657..1e9112fbb472 (4 commits) (flutter/engine#12724)
2019-10-01 30870216+gaaclarke@users.noreply.github.com Resize channel buffers (flutter/engine#12402)
2019-10-01 bkonyi@google.com Roll src/third_party/dart fb1c5a6404..998f1efbe9 (3 commits)
2019-10-01 30870216+gaaclarke@users.noreply.github.com Cleanup: Turned on NS_ASSUME_NONNULL_BEGIN for FlutterViewController. (flutter/engine#12708)
2019-10-01 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from Jr7x0... to Q4sFH... (flutter/engine#12722)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC cbracken@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

* Updates to slider_test.dart

Fixed error that required onChanged.

* Updated slider.dart and slider_test.dart debugFillProperties

Updated slider.dart debugFillProperties to include all properties and slider_test debugFillProperties to test all properties

* Updated Slider onChanged property

* Updated debugFillProperties to ignore testing methods that are null in test

Per feedback from Hans/Anthony on Flutter Material

* Updated spacing in debugFillProperties

Per feedback from Hans

* Updated range_slider.dart and range_slider_test.dart to have DiagnosticProperties tests for all properties

* Updated range_slider.dart and range_slider_test.dart per feedback

Preventing null labels from creating an error.

Added made RangeLabels and RangeValues constants in instantiation of Range Slider.

Fixed spacing.

* Updates to start and end labels in diagnostic property tests

Updated per feedback from @clocksmith

* Stop using build_runner for dart2js

* fixes to yield when computing hashes and to imports

* add missing await

* Update filecache_test.dart

* Fix paths in filecache test

* use file uri for import

* add test cases and configurable override

* remove test dep

* fix filepaths for windows

* test no longer failing

* fix paths for test cases

* fix typo

* address comments

* make a constant

* make filehash async and use constant

* fix silly logic error

16d7694e7 Roll src/third_party/dart 692230b484..67ae444f29 (8 commits)

git@github.com:flutter/engine.git/compare/49815128157d...16d7694e760a

git log 49815128157d..16d7694e760a --no-merges --oneline
2019-10-01 bkonyi@google.com Roll src/third_party/dart 692230b484..67ae444f29 (8 commits)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Spawn no more than 1 iframe in web tests. Using multiple iframes in DDK mode times out tests. Also set concurrency to 1 to guarantee that the test runner does not even attempt to parallelize tests. (#40630)

Spawn no more than 1 iframe in web tests. Using multiple iframes in DDK mode times out tests. Also set concurrency to 1 to guarantee that the test runner does not even attempt to parallelize tests.

This test is flaky if CPU/GPU measurement is enabled due to
https://github.com/flutter/flutter/issues/41577

git@github.com:flutter/engine.git/compare/94363be1eaec...49815128157d

git log 94363be1eaec..49815128157d --no-merges --oneline
2019-09-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia 4a0d36d5bc57..2533afa3f8c6 (4 commits) (flutter/engine#12711)
2019-09-30 bkonyi@google.com Roll src/third_party/dart 14983a2941..692230b484 (5 commits)
2019-09-30 30870216+gaaclarke@users.noreply.github.com Cleanup: Made a macro to assert ARC is enabled. (flutter/engine#12701)
2019-09-30 iska.kaushik@gmail.com [flutter_runner] Verified Execution for read exec on Fuchsia (flutter/engine#12703)
2019-09-30 bkonyi@google.com Roll src/third_party/dart 623fd5c8cd..14983a2941 (2 commits)
2019-09-30 ychris@google.com Adding 'pub get' to the 'compile_xxxx.sh' in the Scenario app (flutter/engine#12699)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/463762b81756...94363be1eaec

git log 463762b81756..94363be1eaec --no-merges --oneline
2019-09-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia 89e1f600ec78..4a0d36d5bc57 (12 commits) (flutter/engine#12704)
2019-09-30 50856934+nturgut@users.noreply.github.com [web_ui] Fixing invalid state bug for text editing (flutter/engine#12698)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/9675ca2f6b00...463762b81756

git log 9675ca2f6b00..463762b81756 --no-merges --oneline
2019-09-30 bkonyi@google.com Roll src/third_party/dart 132bee48d0..623fd5c8cd (50 commits)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/1f454c75330c...9675ca2f6b00

git log 1f454c75330c..9675ca2f6b00 --no-merges --oneline
2019-09-30 liyuqian@google.com Reland "Smooth out iOS irregular input events delivery (#12280)" (flutter/engine#12385)
2019-09-30 gspencergoog@users.noreply.github.com Add missing flag for embedder. (flutter/engine#12700)
2019-09-30 lu.zuccarini@gmail.com Add a method to flutter_window_controller to destroy the current window. (flutter/engine#12076)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/f0c77405d5c2...1f454c75330c

git log f0c77405d5c2..1f454c75330c --no-merges --oneline
2019-09-30 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from sWs8N... to _0Sq8... (flutter/engine#12697)
2019-09-30 jason-simmons@users.noreply.github.com Migrate from fuchsia.crash.Analyzer to fuchsia.feedback.CrashReporter (flutter/engine#12413)
2019-09-30 gspencergoog@users.noreply.github.com Add isFocusable to SemanticsFlag (flutter/engine#12618)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/5b952f286fc0...f0c77405d5c2

git log 5b952f286fc0..f0c77405d5c2 --no-merges --oneline
2019-09-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia e242d0ea937c..89e1f600ec78 (3 commits) (flutter/engine#12696)
2019-09-30 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from ncc-K... to KH7Tv... (flutter/engine#12694)
2019-09-30 50856934+nturgut@users.noreply.github.com Refactoring text_editing.dart (flutter/engine#12479)
2019-09-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia abc851eb3dcc..e242d0ea937c (2 commits) (flutter/engine#12693)
2019-09-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia 0e7500021402..abc851eb3dcc (3 commits) (flutter/engine#12692)
2019-09-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia 7aeabcfa6a73..0e7500021402 (1 commits) (flutter/engine#12691)
2019-09-30 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from eUBos... to sWs8N... (flutter/engine#12690)
2019-09-30 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from VACNQ... to ncc-K... (flutter/engine#12689)
2019-09-29 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from OEG20... to eUBos... (flutter/engine#12688)
2019-09-29 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from 6fMRC... to VACNQ... (flutter/engine#12687)
2019-09-29 skia-flutter-autoroll@skia.org Roll src/third_party/skia be971636cf9b..7aeabcfa6a73 (3 commits) (flutter/engine#12686)
2019-09-29 skia-flutter-autoroll@skia.org Roll src/third_party/skia 2e856451654d..be971636cf9b (1 commits) (flutter/engine#12685)
2019-09-29 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from lHiKM... to OEG20... (flutter/engine#12683)
2019-09-29 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from z3oH6... to 6fMRC... (flutter/engine#12682)
2019-09-28 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from nVAcH... to lHiKM... (flutter/engine#12680)
2019-09-28 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from Kiq-H... to z3oH6... (flutter/engine#12679)
2019-09-28 skia-flutter-autoroll@skia.org Roll src/third_party/skia bd84330ba277..2e856451654d (1 commits) (flutter/engine#12661)
2019-09-28 skia-flutter-autoroll@skia.org Roll src/third_party/skia 8ab1530cd3cd..bd84330ba277 (1 commits) (flutter/engine#12639)
2019-09-28 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from qx53U... to nVAcH... (flutter/engine#12620)
2019-09-28 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from oob8T... to Kiq-H... (flutter/engine#12616)
2019-09-28 skia-flutter-autoroll@skia.org Roll src/third_party/skia 28ad6f869822..8ab1530cd3cd (5 commits) (flutter/engine#12614)
2019-09-27 liyuqian@google.com Revert "[fuchsia] Wire up OpacityLayer to Scenic (#11322)" (flutter/engine#12610)
2019-09-27 30870216+gaaclarke@users.noreply.github.com Started asserting the FlutterEngine is running before communicating over channels. (flutter/engine#12469)
2019-09-27 30870216+gaaclarke@users.noreply.github.com Split out the logic to handle status bar touches into its own function (flutter/engine#12587)
2019-09-27 bkonyi@google.com Roll src/third_party/dart c3c31b74fd..132bee48d0 (16 commits)
2019-09-27 iska.kaushik@gmail.com [flutter_runner] Refactor thread_application pair to ActiveApplication (flutter/engine#12573)
2019-09-27 gw280@google.com Reword confusing messaging surrounding unhandled exception in flutter_runner on Fuchsia (flutter/engine#12428)
2019-09-27 skia-flutter-autoroll@skia.org Roll src/third_party/skia b23d66e10a98..28ad6f869822 (10 commits) (flutter/engine#12580)
2019-09-27 iska.kaushik@gmail.com Revert "Update linux toolchain for fuchsia" (flutter/engine#12578)
2019-09-27 jonahwilliams@google.com Add support for JIT release mode (flutter/engine#12446)
2019-09-27 iska.kaushik@gmail.com Update linux toolchain for fuchsia (flutter/engine#12572)
2019-09-27 iska.kaushik@gmail.com Remove references to topaz (flutter/engine#12565)
2019-09-27 bkonyi@google.com Roll src/third_party/dart 7901c508c8..c3c31b74fd (4 commits)
2019-09-27 skia-flutter-autoroll@skia.org Roll src/third_party/skia 3787f51c65c3..b23d66e10a98 (1 commits) (flutter/engine#12559)
2019-09-27 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from HoRV8... to oob8T... (flutter/engine#12538)
2019-09-27 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from YDv3O... to qx53U... (flutter/engine#12520)
2019-09-27 skia-flutter-autoroll@skia.org Roll src/third_party/skia 296743a86281..3787f51c65c3 (4 commits) (flutter/engine#12512)
2019-09-27 bkonyi@google.com Roll src/third_party/dart 403c4af720..7901c508c8 (7 commits)
2019-09-27 skia-flutter-autoroll@skia.org Roll src/third_party/skia b83cc76a5e3a..296743a86281 (1 commits) (flutter/engine#12491)
2019-09-27 bkonyi@google.com Roll src/third_party/dart 327bc451f8..403c4af720 (9 commits)
2019-09-27 skia-flutter-autoroll@skia.org Roll fuchsia/clang/mac-amd64 from HfPKR... to zpVtV... (flutter/engine#12473)
2019-09-27 skia-flutter-autoroll@skia.org Roll src/third_party/skia ec85f407bfee..b83cc76a5e3a (15 commits) (flutter/engine#12472)
2019-09-27 30870216+gaaclarke@users.noreply.github.com Added a default entrypoint variable to match android syntax. (flutter/engine#12370)
2019-09-26 tauu@h2overclock.de [web_ui] add missing dispose handler for MethodCalls to flutter/platform_view (flutter/engine#12226)
2019-09-26 tauu@h2overclock.de [web_ui] PersistedPlatformView attribute update handling to enable resizing (flutter/engine#12227)
...

* add missing trailing commas

* add more missing trailing commas

* add more and more missing trailing commas

Currently Linux builds override the default BUILD mode by putting it in
the generated config. That makes it sticky for manual runs of make,
which is inconsistent with how other platforms work.

Instead, pass the build mode as a command-line override, the same way
someone would if building directly with make. This makes the flow of
controlling the mode less confusing.

Fixes #41528