The old text was misleading because it was written when RichText was an
implementation detail of Text.

Fixes #2624

[driver] API for getting performance traces

Example that builds a Flutter Android app using Gradle

Updated AppBar.copyWith parameter names

More flutter analyze regexp cleanup

Add @override to starter template

Runs clean on the repo.  Moving ahead, we can manage exceptions via `.analysis_options` or specific source-level ignores.

Add @override annotations to flutter framework

Improve error handling for ChildView outside MojoShell

Stop using a prebuilt APK

add more type annotations

Instead, require an AndroidManifest.xml and always build an APK.

Fixes #2517

Update .analysis_options to link to blocking bugs

Now we should some placeholder error text in-band in checked mode.

Fixes #2611

[rename fixit] TwoLevelSublist left->leading, center->title

Also, some minor cleanup in activity.dart, though much more is
needed (see https://github.com/flutter/flutter/issues/2668).

Remove some more 'dynamic's

Added AppBarBehavior.under, etc

Even more types

change the description of the drive command

misc tool ui changes

update a field ref in playfair

Execute rename fixit (Part 2)

* justifyContent -> mainAxisAlignment
* alignItems -> crossAxisAlignment
* FlexJustifyContent -> MainAxisAlignment
* FlexAlignItems -> CrossAxisAlignment

Fixes #231

Removes an LTR bias in DismissDirection.

Fixes #2562

* left -> leading (Removes an LTR bias)
* center -> title (Widget was actually centered)
* right -> actions (Removes an LTR bias, asymmetric with leading)

Fixes #2348