* Added a composable waitForCondition Driver/extension API.

This reverts commit df2db4e5.

* Added SerializableWaitCondition for communicating between driver script on host and extension on device.

git@github.com:flutter/engine.git/compare/ba51408257b6...9f8b1d223ee8

git log ba51408257b6..9f8b1d223ee8 --no-merges --oneline
2019-08-21 stuartmorgan@google.com Clean up Windows and Linux build output (flutter/engine#11324)
2019-08-21 stuartmorgan@google.com Roll angle licenses (flutter/engine#11035)
2019-08-21 skia-flutter-autoroll@skia.org Roll src/third_party/skia 0b9801eadc12..f99b7960f433 (3 commits) (flutter/engine#11338)

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git@github.com:flutter/engine.git/compare/05a0074580e1...ba51408257b6

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2019-08-21 chinmaygarde@google.com Reference the Flutter framework instead of the dylib in iOS tests. (flutter/engine#11337)
2019-08-21 jonahwilliams@google.com Reland remove kernel sdk script (flutter/engine#10814)
2019-08-21 stuartmorgan@google.com Fix change_install_name.py to be GN-friendly (flutter/engine#11309)

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git@github.com:flutter/engine.git/compare/51bdf834203c...05a0074580e1

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2019-08-21 skia-flutter-autoroll@skia.org Roll src/third_party/skia aa3820a9123c..0b9801eadc12 (3 commits) (flutter/engine#11334)
2019-08-21 dnfield@google.com Add tests for platform views (flutter/engine#11319)

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git@github.com:flutter/engine.git/compare/c43739ba53ce...51bdf834203c

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2019-08-21 chinmaygarde@google.com Migrate Embedder API documentation to Doxygen format. (flutter/engine#11255)
2019-08-21 iska.kaushik@gmail.com Do not add null task observers (flutter/engine#11315)
2019-08-21 chinmaygarde@google.com When using a custom compositor, ensure the root canvas is flushed. (flutter/engine#11310)
2019-08-20 franciscojma86@gmail.com [glfw] Send the glfw key data to the framework. (flutter/engine#9386)

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When building in profile or release mode on desktop, add a prominent
warning that it's actually a debug build. This is to help address issues
with people being unaware of the current state of builds due to
following third-party guides rather than official documentation.

macOS is not included since PRs are in flight for macOS release support.

This reverts commit a11d7314 because of a regression in
flutter_gallery_ios32__transition_perf's 90th_percentile_frame_build_time_millis.

Fixes #38860.

git@github.com:flutter/engine.git/compare/0e90cb40822b...c43739ba53ce

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2019-08-20 skia-flutter-autoroll@skia.org Roll src/third_party/skia b081bc4a3139..aa3820a9123c (16 commits) (flutter/engine#11314)
2019-08-20 stuartmorgan@google.com Set FlutterMacOS podspec min version to 10.11 (flutter/engine#11306)
2019-08-20 iska.kaushik@gmail.com Do not Prepare raster cache if view_embedder is present (flutter/engine#11300)
2019-08-20 bkonyi@google.com Roll src/third_party/dart f7902889b6..027071318f (18 commits)

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git@github.com:flutter/engine.git/compare/ca86f6d7e153...0e90cb40822b

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2019-08-20 jason-simmons@users.noreply.github.com Fix a segfault in EmbedderTest.CanSpecifyCustomTaskRunner (flutter/engine#11305)
2019-08-20 yjbanov@google.com Add Chrome to Dockerfile (flutter/engine#11210)

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Syncs the BUILD.gn with pubspec.yaml for package:test. This fixes a
breakage in the Fuchsia tree.

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

ca86f6d7e Roll src/third_party/skia 52a6a40535b0..b081bc4a3139 (4 commits) (flutter/engine#11267) (#38911)


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git@github.com:flutter/engine.git/compare/10167db43344...d212b9ab33a0

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2019-08-20 bkonyi@google.com Revert "Roll src/third_party/dart f7902889b6..6e2b3f0326 (7 commits)" (flutter/engine#11298)
2019-08-20 bkonyi@google.com Revert "Roll src/third_party/dart 6e2b3f0326..b99df2be86 (5 commits) (#11287)" (flutter/engine#11297)
2019-08-20 bkonyi@google.com Roll src/third_party/dart 6e2b3f0326..b99df2be86 (5 commits) (flutter/engine#11287)
2019-08-20 bkonyi@google.com Roll src/third_party/dart f7902889b6..6e2b3f0326 (7 commits)

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cc @gspencergoog

For https://github.com/flutter/flutter/issues/36064

That performance regression is iOS-only so we'd better get the
benchmarks running on iOS.

Flutter widget tests assert if a test completes with timers still
pending.  However, it can be hard to diagnose where a pending timer
came from.  For example, a widget might consume a third-party library
that internally uses a timer.

I added a FakeAsync.pendingTimersDebugInfo getter to quiver
(https://github.com/google/quiver-dart/pull/500).  Make flutter_test
use it.

Additionally modify Flutter's debugPrintStack to take an optional
StackTrace argument instead of always printing StackTrace.current.

Fixes #4237.

* Add ToggleButtons.textStyle property

Switch from the un-suffixed Windows and Linux libraries to the
_glfw-suffixed versions, in preparation for having non-GLFW versions
using the previous library/wrapper names.

Part of #38589

10167db43 Roll src/third_party/skia 5f152f07455c..52a6a40535b0 (1 commits) (flutter/engine#11253) (#38874)


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git@github.com:flutter/engine.git/compare/df178fd936c0...8098486977db

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2019-08-20 bkonyi@google.com Roll src/third_party/dart 9f13d07670..f7902889b6 (3 commits)

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df178fd93 Remove dart entrypoint Intent parameter from FlutterActivity. (#38713) (flutter/engine#11239) (#38867)


git@github.com:flutter/engine.git/compare/f4591a73a5c7...df178fd936c0

git log f4591a73a5c7..df178fd936c0 --no-merges --oneline
2019-08-20 matthew-carroll@users.noreply.github.com Remove dart entrypoint Intent parameter from FlutterActivity. (#38713) (flutter/engine#11239)

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git@github.com:flutter/engine.git/compare/3e10d92b2bbb...f4591a73a5c7

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2019-08-19 skia-flutter-autoroll@skia.org Roll src/third_party/skia 8566dda51b42..5f152f07455c (8 commits) (flutter/engine#11241)
2019-08-19 chinmaygarde@google.com Provide a placeholder queue ID for the custom embedder task runner. (flutter/engine#11062)

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git@github.com:flutter/engine.git/compare/21ae92651a38...3e10d92b2bbb

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2019-08-19 bkonyi@google.com Roll src/third_party/dart 0e201edeeb..9f13d07670 (27 commits)
2019-08-19 matthew-carroll@users.noreply.github.com Notify framework to clear input connection when app is backgrounded (#35054) (flutter/engine#9498)
2019-08-19 dnfield@google.com Re-enable firebase test and don't use google login (flutter/engine#11228)
2019-08-19 ariaye@google.com Update tflite_native and language_model revisions to match the Dart SDK (flutter/engine#11230)
2019-08-19 skia-flutter-autoroll@skia.org Roll src/third_party/skia f8221786d088..8566dda51b42 (4 commits) (flutter/engine#11220)
2019-08-19 chinmaygarde@google.com Update metal layer drawable size on relayout. (flutter/engine#11224)
2019-08-19 dnfield@google.com Make firebase testlab always pass (flutter/engine#11226)

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* Added new ButtonBarTheme to replace the deprecated ButtonTheme.bar method.

* Responding to PR feedback.

* [Material] Create material Banner component (#36880)

This PR creates a new material widget for the Banner component. This includes a theme as well. This widget can be dropped into any application, ideally at the top of a listview or scrollview.

(cherry picked from commit 35b6d668)

Removed the use of ButtonTheme.bar in the Banner implementation.

* Updated documentation from PR review comments.