Previously, when the content extent changed during a scroll interaction, we'd
stop the current scroll interaction and reset the scroll offset. Now we try to
continue the scroll interaction (e.g., drag, fling, or overscroll) even through
the underlying scroll behavior has changed.

For physics-based scroll interactions, we keep the current position and
velocity and recompute the operative forces. For drag interactions, we keep the
current position and continue to let the user drag the scroll offset.

After this patch, we still disrupt non-physical scroll animations that are
operating outside the new scroll bounds because it's not clear how we can
sensibly modify them to work with the new scroll bounds.

Update SkyApplication to SkyMain in the hello_android example

TwoLevelList fails to restore sublist expanded state

Update ChildView after Mojo roll

Set FLUTTER_ROOT to an absolute path

The Mozart API has changed.

This implementation was taken from the Dart SDK shell scripts.

BUG=https://github.com/flutter/flutter/issues/2795

Replace use of LruMap with a pure LinkedHashMap

Handle NaNs in constraints, just in case.

...so that we can shed the quiver dependency in flutter's framework.

CustomPaint documentation

prettier IconData toString

Port to crypto 0.9.2

...followed all the way back to ImageCache, ImageInfo, ImageProvider,
and friends.

Rationalise the overflow render boxes

Fixed VirtualViewport child key assignment

New RenderAligningShiftedBox abstract class for render boxes with
"alignment", which as of now is:

 - RenderPositionedBox
 - RenderConstrainedOverflowBox (ex RenderOverflowBox)
 - RenderSizedOverflowBox
 - RenderFractionallySizedOverflowBox (ex RenderFractionallySizedBox)

(The respective widgets are Align, OverflowBox, SizedOverflowBox, and
FractionallySizedBox. They haven't been renamed.)

Also I added some toString details.

change how we calculate the temp dir

Fix RenderFractionallySizedBox's constraints logic

Fixes https://github.com/flutter/flutter/issues/2735

Provide APIs for exchanging messages with the host application

Update the engine

Fix Fast Fling Failure

Use the artifacts store for iOS assets

Update engine.version to get the ApplicationMessages interface

Dont differentiate between ios_arm and ios_x64 in flutter_tools

All artifacts for iOS are universal.

don't wait for the observatory if the app didn't start