Add some more dart doc to RepaintBoundary (flutter#17183)

Passing any to named params require the name of the parameter itself. (…

…flutter#18361)

Add locale parameter to EditableText (flutter#18222)

_markNeedsClip() when clipper type has changed. (flutter#18248)

A bug in _RenderCustomClip was compaeing the type of oldClipper to
itself instead to the type of newClipper.

This was the root cause for the crash flutter#14937 worked around.
This also reverts the workaround introduced in flutter#14937.

Revert sync async (flutter#18002)

Roll engine to 2b1f3db.

This is one before dart roll.

roll engine to 06afdfe (flutter#17527)

Roll engine to 9ae10ef (flutter#17503)

This contains the following commits:

flutter/engine@9ae10ef Revert f6359e4

Enable universal iOS binaries in templates (flutter#17358)

Eliminates the restrictions to build in arm64 mode only in iOS project
templates created by flutter create.

Fix running dev/bots/test.dart in Dart 2 mode (flutter#17256)