* Make sendMouseNotifications private

* Fix DropdownButton crash when hint and selectedItemBuilder are simultaneously defined

git@github.com:flutter/engine.git/compare/0d749933bcc6...e69319216729

git log 0d749933bcc6..e69319216729 --no-merges --oneline
2019-10-09 hterkelsen@users.noreply.github.com [web_ui] Check if a pointer is already down for the specific device (flutter/engine#12470)
2019-10-09 bkonyi@google.com Roll src/third_party/dart bb04f145b2..41d13f0ffe (24 commits)
2019-10-09 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from u0JpE... to pczjK... (flutter/engine#13025)
2019-10-09 gspencergoog@users.noreply.github.com Add missing focusable testing info (flutter/engine#13013)
2019-10-09 skia-flutter-autoroll@skia.org Roll src/third_party/skia 54548626a977..e27a503a0a21 (1 commits) (flutter/engine#13024)
2019-10-09 30870216+gaaclarke@users.noreply.github.com Refactor: FlutterDartProject (flutter/engine#13006)
2019-10-09 skia-flutter-autoroll@skia.org Roll src/third_party/skia 77dde599c98a..54548626a977 (1 commits) (flutter/engine#13023)
2019-10-09 skia-flutter-autoroll@skia.org Roll src/third_party/skia 2b1a25a4d324..77dde599c98a (1 commits) (flutter/engine#13021)
2019-10-09 bkonyi@google.com Roll src/third_party/dart f4a72bfc64..bb04f145b2 (18 commits)
2019-10-09 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from q_uYX... to cknsi... (flutter/engine#13019)
2019-10-09 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from wuAtw... to u0JpE... (flutter/engine#13018)


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 chinmaygarde@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

* No longer rebuild Routes when MediaQuery updates

fixes #37878

* Fix tests

* PR feedback

* Add missing endline

* Reprise: Dropdown Menu layout respects menu items intrinsic sizes

* updated per review feedback

* updated per review feedback

This updated the broken android_semantics_test to correspond to existing engine behavior.

This adds a Semantics node to the Focus and FocusScope widgets, setting the focused and focusable attributes so that the accessibility subsystem can be told when a control has the input focus.

Includes an engine roll to flutter/engine@77252d2, and the following 8 engine changes:

flutter/engine@77252d2 Greg Spencer Add missing focusable testing info (flutter/engine#13013)
flutter/engine@0e42a29 skia-flutter-.. Roll src/third_party/skia 54548626a977..e27a503a0a21 (1 commits) (flutter/engine#13024)
flutter/engine@6b56ed7 gaaclarke Refactor: FlutterDartProject (flutter/engine#13006)
flutter/engine@393480c skia-flutter-.. Roll src/third_party/skia 77dde599c98a..54548626a977 (1 commits) (flutter/engine#13023)
flutter/engine@080b89d skia-flutter-.. Roll src/third_party/skia 2b1a25a4d324..77dde599c98a (1 commits) (flutter/engine#13021)
flutter/engine@90b0f30 Ben Konyi Roll src/third_party/dart f4a72bfc64..bb04f145b2 (18 commits) (flutter/engine#13020)
flutter/engine@049fb89 skia-flutter-.. Roll fuchsia/sdk/core/linux-amd64 from q_uYX... to cknsi... (flutter/engine#13019)
flutter/engine@6925b2a skia-flutter-.. Roll fuchsia/sdk/core/mac-amd64 from wuAtw... to u0JpE... (flutter/engine#13018)

Related Issues
Addresses #40101

Landing on red in order to fix the build: it's red because of the needed engine roll.

Fix regression with ModalBottomSheets not responding to changes in theme
after they are shown.

0d749933b Roll src/third_party/skia 1494a7f1ec03..2b1a25a4d324 (15 commits) (flutter/engine#13016) (#42290)


git@github.com:flutter/engine.git/compare/1e58794b238b...0d749933bcc6

git log 1e58794b238b..0d749933bcc6 --no-merges --oneline
2019-10-09 skia-flutter-autoroll@skia.org Roll src/third_party/skia 1494a7f1ec03..2b1a25a4d324 (15 commits) (flutter/engine#13016)


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 chinmaygarde@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

Ensure web restart analytics events aren't sent for failures/dont serve devtools by default  (#42260)

git@github.com:flutter/engine.git/compare/21b8224ae12d...1e58794b238b

git log 21b8224ae12d..1e58794b238b --no-merges --oneline
2019-10-09 chinmaygarde@gmail.com Revert "Upgrade compiler to Clang 10. (#11256)" (flutter/engine#13017)
2019-10-09 chinmaygarde@google.com Upgrade compiler to Clang 10. (flutter/engine#11256)


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 chinmaygarde@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/c635d70c7266...21b8224ae12d

git log c635d70c7266..21b8224ae12d --no-merges --oneline
2019-10-08 gspencergoog@users.noreply.github.com Send AccessibilityEvent.TYPE_VIEW_FOCUSED when input focus is set. (flutter/engine#12746)
2019-10-08 dnfield@google.com Fix for a11y crash on iOS (flutter/engine#12990)
2019-10-08 katelovett@google.com Link Semantics Typo (flutter/engine#13009)
2019-10-08 ferhat@gmail.com [web] Add support for path transform (flutter/engine#12794)
2019-10-08 jason-simmons@users.noreply.github.com Auto-formatter fixes for BUILD.gn files (flutter/engine#13005)
2019-10-08 bkonyi@google.com Unblock SIGPROF on flutter_tester start (flutter/engine#12813)
2019-10-08 mouad.debbar@gmail.com [web] Update the url when route is replaced (flutter/engine#13003)
2019-10-08 katelovett@google.com Missing link flag (flutter/engine#13001)
2019-10-08 30870216+gaaclarke@users.noreply.github.com Started setting our debug background task id to invalid after completion. (flutter/engine#12999)
2019-10-08 ychris@google.com Add `onUnregistered` callback in 'Texture' and 'FlutterTexture' (flutter/engine#12695)


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 chinmaygarde@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/5b3182294f63...c635d70c7266

git log 5b3182294f63..c635d70c7266 --no-merges --oneline
2019-10-08 skia-flutter-autoroll@skia.org Roll src/third_party/skia 902cf1e12a74..1494a7f1ec03 (10 commits) (flutter/engine#13000)
2019-10-08 liyuqian@google.com SkSL precompile (flutter/engine#12412)
2019-10-08 chinmaygarde@google.com Compile sanitizer suppressions list and file bugs as necessary. (flutter/engine#12991)
2019-10-08 chinmaygarde@google.com Add a unit-test to verify that root surface transformation affect platform view coordinates. (flutter/engine#12783)
2019-10-08 katelovett@google.com Re-land Adding Link Semantics (flutter/engine#12972)


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 chinmaygarde@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/3a445edda924...5b3182294f63

git log 3a445edda924..5b3182294f63 --no-merges --oneline
2019-10-08 bkonyi@google.com Roll src/third_party/dart aece1c1e92..f4a72bfc64 (4 commits)
2019-10-08 30870216+gaaclarke@users.noreply.github.com Added an embedder example (flutter/engine#12808)
2019-10-08 sebastian.roth@gmail.com Fix typo on channel buffer debug output. (flutter/engine#12960)


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 chinmaygarde@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/49dbaae818cd...3a445edda924

git log 49dbaae818cd..3a445edda924 --no-merges --oneline
2019-10-08 30870216+gaaclarke@users.noreply.github.com Made _printDebug only happen on debug builds of the engine for now. (flutter/engine#12980)
2019-10-08 devoncarew@google.com remove references to package:_chrome (flutter/engine#12931)
2019-10-08 ditman@gmail.com Open source canvas tests from flutter_web_ui (flutter/engine#12819)
2019-10-08 mouad.debbar@gmail.com Prevent default when Tab is clicked (flutter/engine#12986)


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 chinmaygarde@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/611c345a4e76...49dbaae818cd

git log 611c345a4e76..49dbaae818cd --no-merges --oneline
2019-10-08 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from gB_ii... to q_uYX... (flutter/engine#12996)
2019-10-08 aam@google.com Roll dart to aece1c1e92. (flutter/engine#12997)
2019-10-08 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from wOfz2... to wuAtw... (flutter/engine#12995)


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 chinmaygarde@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

Similar to errorMaxLines

611c345a4 Roll src/third_party/skia a28cf7c08061..902cf1e12a74 (4 commits) (flutter/engine#12994) (#42244)


git@github.com:flutter/engine.git/compare/819b0cae0c23...611c345a4e76

git log 819b0cae0c23..611c345a4e76 --no-merges --oneline
2019-10-08 skia-flutter-autoroll@skia.org Roll src/third_party/skia a28cf7c08061..902cf1e12a74 (4 commits) (flutter/engine#12994)


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 chinmaygarde@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/4a849e0f8dd5...819b0cae0c23

git log 4a849e0f8dd5..819b0cae0c23 --no-merges --oneline
2019-10-08 skia-flutter-autoroll@skia.org Roll src/third_party/skia f611d943fb73..a28cf7c08061 (29 commits) (flutter/engine#12993)
2019-10-08 garyq@google.com Unpublicize kDoNotResizeDimension (flutter/engine#12989)
2019-10-08 skia-flutter-autoroll@skia.org Roll src/third_party/skia 4c82a9fc83a5..f611d943fb73 (1 commits) (flutter/engine#12831)
2019-10-08 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from kwa2O... to wOfz2... (flutter/engine#12827)
2019-10-08 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from by2LL... to gB_ii... (flutter/engine#12979)
2019-10-08 jason-simmons@users.noreply.github.com Roll Wuffs to 0.2.0-rc.1 (flutter/engine#12983)


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 chinmaygarde@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/1d62160fdb2f...4a849e0f8dd5

git log 1d62160fdb2f..4a849e0f8dd5 --no-merges --oneline
2019-10-08 dnfield@google.com Color matrix doc (flutter/engine#12982)
2019-10-07 jason-simmons@users.noreply.github.com Use the standard gen_snapshot target unless the platform requires host_targeting_host (flutter/engine#12988)
2019-10-07 bkonyi@google.com Roll src/third_party/dart 8413a0db0d..8ba6f7e2eb (39 commits) (flutter/engine#12981)
2019-10-07 liyuqian@google.com Unblock Fuchsia roll (flutter/engine#12977)
2019-10-06 chinmaygarde@google.com Update buildroot to pull in ubsan updates. (flutter/engine#12821)
2019-10-05 skia-flutter-autoroll@skia.org Roll src/third_party/skia 95edac1c9a4a..4c82a9fc83a5 (13 commits) (flutter/engine#12818)
2019-10-05 chinmaygarde@google.com Enable sanitizer build variants. (flutter/engine#12816)
2019-10-05 katelovett@google.com Revert "Adding Link SemanticsFlag (#12453)" (flutter/engine#12815)
2019-10-04 jason-simmons@users.noreply.github.com Use the x64 host toolchain for x86 target gen_snapshot only on Linux (flutter/engine#12809)
2019-10-04 yjbanov@google.com add option for bulk-updating screenshots; update screenshots (flutter/engine#12797)
2019-10-04 dnfield@google.com unbreak unopt fuchsia (flutter/engine#12805)
2019-10-04 jason-simmons@users.noreply.github.com Build gen_snapshot with a 64-bit host toolchain even if the target platform is 32-bit (flutter/engine#12802)
2019-10-04 dnfield@google.com [flutter_runner] a11y updates, tests! (flutter/engine#12380)
2019-10-04 WATER1350@gmail.com Fix crash in copypixelbuffer (flutter/engine#10326)
2019-10-04 bkonyi@google.com Roll src/third_party/dart d6c6d12ebf..8413a0db0d (2 commits)
2019-10-04 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from JyZWz... to kwa2O... (flutter/engine#12803)
2019-10-04 katelovett@google.com Adding Link SemanticsFlag (flutter/engine#12453)


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

Applying our style guide:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#have-good-hygiene-when-using-temporary-directories