backgroundColor -> color
backgroundImage -> image
BackgroundImage -> DecorationImage

* Remove Pods dir from layers example

* Remove Pods dir from flutter_view example

* make @immutable const

* fix build

* Add Pods cache dir to ios/.gitngnore

* Add missing ending newlines

* comprehensive list of lints
* add comments to commented out lint
* fix unnecessary_this lints
* exclude prefer_final_fields

Follow-up from #9422

* 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

Aggressively apply the const lint.

This yak shave went as follows:

Fix https://github.com/flutter/flutter/issues/8795 by adding stocks to
the examples README.

Notice the layers entry in that README isn't quite right either.
Update that.

Check the layers/README file is worth pointing at.

Update the layers/README.

Let's run some of the layer tests to see if they still work.

Oops, need to update them to gradle.

Ok let's try running them again.

Oops, sector is broken.

Add a test for sector.

Fix sector. Find you need to add an assert to a const constructor.

Notice we need to turn const asserts on for the analyzer.

Notice the analysis_options files are out of sync with each other and
with the full list of lints.

Turn on the lints that should be on.

Fix the bugs that finds.

* Make IntelliJ metadata files consistent with the current flutter create template

* Add missing IJ files from current flutter create template

* Remove run config from layers as it requires running with -t

* Remove workspace.xml files per review feedback

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

* address review comments

* use color.shadeXxx instead of color[Xxx]

* remove calls to .shade500 on MaterialColor

* remove calls to .shade200 on MaterialAccentColor

* fix test

* Move .iml file back to project root directory

* Update .iml location in all examples

This prepares us for a CustomScrollView that takes slivers.

The only remaining client of ScrollableGrid (the old version) is Pesto,
which needs AppBar integration.

* Disable 'Show Excluded' by default

* Move .iml file inside .idea dir

* Remove pub and build excludions as they are automatically set by the Dart plugin

* Exclude .idea folder (new users will edit it through the IJ UI, not the file)

* Move .iml files into .idea dir to be consistent with template changes

* Add workspace.xml from new template to existing samples

* Update current examples to match template changes for excluding folders

* Add missing flutter.yaml to make sure there are no analysis errors

* Add back .pub and build excludeFolder tags per https://github.com/flutter/flutter-intellij/issues/630#issuecomment-272887230

* Remove workspace.xml from example per review feedback

...now that we have generic methods, their types need to be specified too.

* Add example IntelliJ metadata (flutter-intellij#607).

Ensures example projects open cleanly out-of-the-box w/ the Flutter Plugin.

See: https://github.com/flutter/flutter-intellij/issues/607.

* Fixed IML files.

We didn't end up using this mechanism.

* s/sky/flutter/ in Android templates

* update engine.version with a compatible engine version

* replace more SkyActivity references with FlutterActivity

This patch replaces uses of Flexible with Expanded where we're using
FlexFit.tight. We still need to think of a better name for the
FlexFit.loose variant.

Also, improve the docs for Row, Column, Flex, and RenderFlex to be more
problem-oriented and to give a complete account of the layout algorithn.

Fixes #6960
Fixes #5169

* Remove the workaround that pinned args to v0.13.6
This reverts most of the changes in commit 6331b6c8
* throw exception if exit code is not an integer
* rework command infrastructure to throw ToolExit when non-zero exitCode
* convert commands to return Future<Null>
* cleanup remaining commands to use throwToolExit for non-zero exit code
* remove isUnusual exception message
* add type annotations for updated args package

Instead, we now interact with the system navigator via SystemNavigator.

This is needed to update an app's layout when a soft keyboard is shown

This example is misleading because it relies on the old services model.
Let's remove it until #6263 is fixed.

Now dart:ui does the decoding of the pointer data itself, which means we don't
need to do it in the framework.