I can't figure out if this is genius or a giant hack.

This lets you use DefaultTextStyle.merge and IconTheme.merge without
specifying a BuildContext. It automatically merges in at the
appropriate place in the tree using a Builder widget.

Remove intermediate animation listener

* Manually fix every use of Point.x and Point.y

Some of these were moved to dx/dy, but not all.

* Manually convert uses of the old gradient API

* Remove old reference to Point.

* Mechanical changes

I applied the following at the root of the Flutter repository:

git ls-files -z | xargs -0 sed -i 's/\bPoint[.]origin\b/Offset.zero/g'
git ls-files -z | xargs -0 sed -i 's/\bPoint[.]lerp\b/Offset.lerp/g'
git ls-files -z | xargs -0 sed -i 's/\bnew Point\b/new Offset/g'
git ls-files -z | xargs -0 sed -i 's/\bconst Point\b/const Offset/g'
git ls-files -z | xargs -0 sed -i 's/\bstatic Point /static Offset /g'
git ls-files -z | xargs -0 sed -i 's/\bfinal Point /final Offset /g'
git ls-files -z | xargs -0 sed -i 's/^\( *\)Point /\1Offset /g'
git ls-files -z | xargs -0 sed -i 's/ui[.]Point\b/ui.Offset/g'
git ls-files -z | xargs -0 sed -i 's/(Point\b/(Offset/g'
git ls-files -z | xargs -0 sed -i 's/\([[{,]\) Point\b/\1 Offset/g'
git ls-files -z | xargs -0 sed -i 's/@required Point\b/@required Offset/g'
git ls-files -z | xargs -0 sed -i 's/<Point>/<Offset>/g'
git ls-files -z | xargs -0 sed -i 's/[.]toOffset()//g'
git ls-files -z | xargs -0 sed -i 's/[.]toPoint()//g'
git ls-files -z | xargs -0 sed -i 's/\bshow Point, /show /g'
git ls-files -z | xargs -0 sed -i 's/\bshow Point;/show Offset;/g'

* Mechanical changes - dartdocs

I applied the following at the root of the Flutter repository:

git ls-files -z | xargs -0 sed -i 's/\ba \[Point\]/an [Offset]/g'
git ls-files -z | xargs -0 sed -i 's/\[Point\]/[Offset]/g'

* Further improvements and a test

* Fix minor errors from rebasing...

* Roll engine

Rename State.config to State.widget
Rename State.didUpdateConfig to State.didUpdateWidget
Renamed all State subclasses' local variables named config to something else

* Wiring fullscreen dialog

* Make fullscreen dialog use the new API. Add tests

* Review notes

* Move field back up

* final

* upgrade to linter-0.1.30

* add prefer_is_empty lint
* add directives_ordering lint
* add no_adjacent_strings_in_list lint
* add no_duplicate_case_values lint
* add prefer_collection_literals lint
* add prefer_const_constructors lint
* add prefer_contains lint
* add prefer_initializing_formals lint
* add unnecessary_null_aware_assignments lint
* add unnecessary_null_in_if_null_operators lint

Nobody knew what a Block was.

Aggressively apply the const lint.

Fixes https://github.com/flutter/flutter/pull/8643

Fixes https://github.com/flutter/flutter/issues/8804 by adding a test
to verify that Material elevation changes animate.

Also tweak some dartdocs, add some trailing commas, improve some
toString output, make the inkwell test agnostic to the PhysicalModel
logic, and move the material buttons test to the material test
directory.

Add some commentary around DefaultTabController.initialIndex.
Fix typo (nuull) in TabBar.
Make some asserts more detailed.

Fixes https://github.com/flutter/flutter/issues/9186

* Just realized the creation order is the other way around

* Works

* Revert previous partial solution

* Change pumpAndSettle to pump for gestures

TextFormField doesn't actually have many properties because it wraps a
TextField. Rather than trying to document all the arguments in the
constructor, we now refer to the docs for TextField, which explain the
parameters in a more readable way.

Fixes #7245

This method seemed overly specific to the needs of one particular
subclass. This patch duplicates some code but makes the API conceptually
cleaner.

Fixes #8267

We should always use the maxWidth from the incomming constraints to size the
text inside the editable because the EditableText itself always expands to fill
its width.

Also, make sure InputDecoration always expands horizontially (even when there's
no icon) for consistency.

Fixes #9149

* Moved stuff around yet

* Fix depedencies

* Add more dartdoc comments to packages

* Remove Cupertino dependency on material

* Removed mountain_view package and added page transition test

* Fix analyze warnings

* Remove commented code

* Partial solution. Still need to stop the animation on the previous page for modal

* Some review notes

* Move the cupertino back gesture controller’s lifecycle management back to its parent

* Reviews

* Add background color

* Directional curves, full screen transition

* Don’t perform the exit animation if the incoming page is a dialog

* It works!

* Test structures

* Add a bunch of more tests and fix the gallery

* One more comment

* Review notes

* final controller

* Use that sweet sweet `is!` keyword

* Play golf, because I’m bitter that there’s no nullable `as` or something in dart

* Remove a space

* Review notes

* Remove the last deprecated test

* Moved stuff around yet

* Fix depedencies

* Add more dartdoc comments to packages

* Remove Cupertino dependency on material

* Removed mountain_view package and added page transition test

* Fix analyze warnings

* Remove commented code

* Some review notes

* Move the cupertino back gesture controller’s lifecycle management back to its parent

* Reviews

* Add background color

* final controller

* Review notes

Also, fix an issue where hint text wasn't visible when the
InputDecoration was collapsed.

Fixes #8541

After this patch, there are three major text input widgets:

 * EditableText. This widget is a low-level editing control that
   interacts with the IME and displays a blinking cursor.

 * TextField. This widget is a Material Design text field, with all the
   bells and whistles. It is highly configurable and can be reduced down
   to a fairly simple control by setting its `decoration` property to
   null.

 * TextFormField. This widget is a FormField that wraps a TextField.

This patch also replaces the InputValue data model for these widgets
with a Listenable TextEditingController, which is much more flexible.

Fixes #7031

We now have an explicit focus tree that we manage. Instead of using
GlobalKeys to manage focus, we use FocusNode and FocusScopeNode objects.
The FocusNode is Listenable and notifies when its focus state changes.

Focus notifications trigger by tree mutations are now delayed by one
frame, which is necessary to handle certain complex tree mutations. In
the common case of focus changes being triggered by user input, the
focus notificiation still arives in the same frame.

* add @required when there's an assert not null

* address review comments

* Add FadeTransition to Android page transition

* Also move starting point up

* Add test

* Use const fractional offset

* adds border radius to ink widgets. sets default ink border radius for material buttons with no background colors

* tidying up code

* add ink test stub

* remove unused import

Fixes issue with removing and re-adding a toolbar which is connected to the same TabBarController (#9015)

Otherwise it's somewhat verbose to configure all the text themes.

* adds highlight + splash color properties to material button

* add states to raised button + flat button

* fixes an issue where the custom highlight would not be properly set

* Add preliminary tests for theme highlight + splash and via theme

* documentation changes. tweaks per code review feedback

* comment out unused variable

* remove unused import

* documentation updates. removed commented code

* Improvements to CircleAvatar default color (for codelab)

* use a transparent white instead of a solid one

* Fix analyzer errors

* fix tests