This CL cleans up the sky/framework/animation as follows:

1) I've moved code that's used only by the custom elements framework into
   sky/framework/elements/animation. This code is based on AnimationDelegates
   rather than Streams.
2) Rename ScrollCurve to ScrollBehavior because it encapsulates more behavior
   than just a curve.
3) Make the Generator interface explicit and mark subclasses as actual
   subclasses.
4) Move Simulation into generators.dart because it implements the Generator
   interface.
5) Move Animation out of generators.dart because it does not implement the
   Generator interface.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1001373002

When using OverscrollCurve, we continue to scroll beyond the top of the
scrollable area but the scroll delta is reduced by 2x. A future CL will add an
animation at gesturescrollend to relax back to scroll position 0.0.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1002953003

Intead of hard-coding the notion of bounded scrolling into Scrollable, this CL
factors out a ScrollCurve class that applies the bounds. In the future, we'll
refine this mechanism to implement overflow scrolling.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1005633002

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1000863002

Also:
* Fix consecutive spaces (don't collapse them).
* Add support for ^L.

Still doesn't work:
* Totally blank lines. (I know why, but I don't know why I can't seem to
  fix it.)

R=erg@chromium.org

Review URL: https://codereview.chromium.org/997873004

D'oh.

TBR=erg@chromium.org

Review URL: https://codereview.chromium.org/998103002

(Together with an app that echoes stuff from the terminal.)

R=erg@chromium.org

Review URL: https://codereview.chromium.org/999193002

To accomplish this, I made the following changes:

1) Material is now in charge of drawing the material shadows.
2) In order to mix in the style for the shadow, Element now takes a list of
   Styles instead of a single style.
3) Update all clients of Element#style to understand that we now have a list.
4) Update components that drawer shadows to have Material do that work instead.
   a) One exception: FloatingActionButton draws its own shadow because of its
      crazy clip requirements. We'll probably want to find a better way for
      FloatingActionButton to clip in the future.

I've also added a widgets-fn example to demo the fn material widgets.

This CL introduces a bug into Drawer whereby you can get ink splashes
everywhere in the drawer. In the future, we'll need to separate out the
different material aspects to get non-splashable materials.

R=rafaelw@chromium.org

Review URL: https://codereview.chromium.org/1003553002

We're not actively developing these at the moment.

I could also just delete them, not sure if we're ready for that yet.

TBR=abarth@chromium.org

Review URL: https://codereview.chromium.org/999873002

We don't yet reset the scroll offset, so sometimes you can't see your search
results properly.

R=rafaelw@chromium.org

Review URL: https://codereview.chromium.org/1002453003

R=rafaelw@chromium.org

Review URL: https://codereview.chromium.org/996213004

Instead of MaterialComponent being a base class, components that want material
behavior simply create a MaterialComponent during their render function. This
approach gives the component more flexibility as to its structure and gives
MaterialComponent more flexibility has to how the components it generates are
related to the existing children.

Also, I've improved some of the event delegation code. There's no reason to
attach event handlers to the root component you emit during |render| because
the framework already delegates events from your root component to you.

R=rafaelw@chromium.org

Review URL: https://codereview.chromium.org/983903003

The search field doesn't do anything, but it's there.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/998803002

Moving these files into sky/framework will make them easier to use from the
SDK. Also, this CL also splits up the giant "widgets" library into smaller
libraries, one per component.

TBR=eseidel@chromium.org

Review URL: https://codereview.chromium.org/993033003

The implementation details are in sky/framework/editing.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/983213005

We don't yet have a focus controller, which means once this control becomes
focused there's no way for it to lose focus.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/999553002

http://www.google.com/design/spec/components/lists.html#lists-behavior

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/993093004

54px on small screens:
http://www.google.com/design/spec/layout/metrics-keylines.html#metrics-keylines-keylines-spacing

TBR=abarth@chromium.org

Review URL: https://codereview.chromium.org/995133002

This CL factors EditableString out of EditableText and implements more of the
InputConnection functions. As a result, EditableText now basically works.

This CL also paves the way to make EditableText stateless by using
EditableString as its state object. However, there's still a bit more work to
do to make that a reality (e.g., factoring out the cursor blink timer and the
connection to the keyboard).

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/995073002

This patch allows for an initial delay before an animation begins and also adds an Animation class which encapsulates a value which is long-lived, can be explicitly set and also animated from its current value to another value.

BUG=
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/994143002

This CL introduces a new keyboard service that understands Android IME and
starts work on a Input component that interacts with this service to provide an
editing control.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/995613002

"Render" is misleading. "Build" may not be the best word either, it's closer to what's actually happening.

R=ojan@chromium.org
TBR=abarth
BUG=

Review URL: https://codereview.chromium.org/992033002

Ensure that sky Nodes are in the document when didMount() is fired. Refactor FixedHeightScrollable to inspect heights rather than having the passed in

BUG=
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/994553003

TBR=eseidel
BUG=

Review URL: https://codereview.chromium.org/987833002

This patch changes the timing of the unmount call until after the component is removed (and marked as such) and allows setState to be called after this point. If this happens, setState will still invoke the closer to do any neccesary cleanup, but doesn't schedule the component for render

R=eseidel@chromium.org, eseidel
BUG=

Review URL: https://codereview.chromium.org/985853002

TBR=eseidel
BUG=

Review URL: https://codereview.chromium.org/983173003

This provokes a rendering bug in MojoShell but not in SkyShell.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/984793002

To test:
sky/tools/shelldb analyze sky/examples/stocks-fn/stocksapp.dart

It prints 600+ warnings about the "native" keyword, and after
this change only a couple warnings about missing library names
which I don't fully understand.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/987613002

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/980043005

That's where it belongs.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/979283002

It's awkward to work on fn.dart in the examples directory so this CL moves it
to /sky/framework. Also, I've merged the whole library into one file instead of
using the |part| mechanism. The whole thing isn't that big.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/987463002

These examples don't work anymore and have been replaced with
color-chooser.sky.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/987443002

This CL changes the duration of the drawer animation to match the values used
by the Android framework.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/976193002

- Removed out-of-date README.md
- Moved fling-curve into the animation directory because it's part of the
  animation behavior of the system.
- Moved view-configuration into the theme directory because it's a collection
  of constants similar in flavor to the colors and the shadows. Eventually
  we'll want to make the theme configurable and have these all together will
  hopefully make that easier.
- Moved dom-serializer into tests/resources because it is used only by tests.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/980423002

Instead, we can just use the existing animation/curves.dart file in the
framework.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/976373003

This CL removes the hard-coded colors and shadows from the fn widgets and
replaces them with compile-time constants. The color values are from the
material spec:

http://www.google.com/design/spec/style/color.html#color-color-palette

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/983733003

Instead of duplicating fling-curve.dart in fn, we now share the existing copy
in sky/framework.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/976363003