New asserts:
- verify that after layout, the size fits the constraints
- verify that after layout, the size isn't infinite
- verify that you don't set the size in performLayout() if you have
  sizedByParent set
- verify that nobody reads your size during layout except you, or your
  parent if they said parentUsesSize:true

Fixes some bugs found by those asserts:
- RenderBlock, RenderStack, and RenderScaffold were not always setting
  parentUsesSize correctly
- RenderScaffold was setting its slot entries to null rather than
  removing them when the slot went away, which led to null derefs in
  certain circumstances

Also, rename a local variable in RenderStack.performLayout() because
it was shadowing a variable on the object itself, which was really
confusing when I first tried to debug this function...

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1213473003.

There's is no support for animating the selected tab indicator, there isn't a TabNavigator container yet, overflow layout (tabs don't fit) isn't supported yet, etc.

R=abarth@chromium.org, ianh@google.com

Review URL: https://codereview.chromium.org/1205953002.

Adds documentation to Texture and SpriteSheet

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1212073002.

Win was not being detected.

BUG=none
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1209823002.

This also fixes the C++ side to give the right baseline information.
Previously it was giving the baseline distance for the font, but not
for the actual laid-out text.

I considered also providing a "defaultBaseline" accessor that returns
the distance for the actual dominant baseline, but it turns out right
now we never decide the baseline is ideographic. We always use the
alphabetic baseline. We should probably fix that...

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1200233002.

Also, some minor cleanup in TextStyle to make it more readable.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1203253002.

TBR=iansf

Review URL: https://codereview.chromium.org/1201383005.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1208483002.

Decouple Canvas from DisplayList and map Picture and PictureRecorder more directly to their Skia counterparts.

Also changes the framework dart code to use the
refactored APIs and fixes the various examples and
tests.

R=abarth@chromium.org, ianh@chromium.org

Review URL: https://codereview.chromium.org/1190123003.

Adds drawImageRect to Canvas bindings

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1204783003.

I'm not sure I made it look better.  But it uses Widgets
instead of rolling its own Flex, etc.

R=ianh@google.com, cpu@chromium.org

Review URL: https://codereview.chromium.org/1201293003.

R=ianh@google.com, abarth, hixie

Review URL: https://codereview.chromium.org/1201273002.

A very basic minesweeper clone. Currently only tested in linux.

BUG=none
R=abarth@chromium.org, eseidel@chromium.org

Review URL: https://codereview.chromium.org/1196213012.

Also updated the version range on stocks2.

https://github.com/domokit/mojo/issues/262

R=ianh@google.com

Review URL: https://codereview.chromium.org/1195933004.

Make the checkbox in settings control the radio buttons in the drawer, to demonstrate how to link state in different places in an app.

R=jackson@google.com

Review URL: https://codereview.chromium.org/1197333002.

This returns us to a more stocks1-like arrow style.
Also it uses math rather than transforms to rotate the arrow, since transforms are expensive.
It also removes the save/restore calls, which are _really_ expensive.

Also some minor style fixes.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1203443007.

R=ianh@google.com, hixie

Review URL: https://codereview.chromium.org/1204523002.

Short-circuit the relayoutSubtreeRoot when the child couldn't change dimensions anyway because the parent constrained it.

The relayout subtree root concept is intended to handle the case where
a node, when it lays itself out for a second time, changes its opinion
about what dimensions it should be. In such a situation, the parent,
if it based its own opinion about what size _it_ should be on the
child's dimensions, would also need to lay itself out again. Thus,
when this scenario is possible, the child remembers the parent, and
when it would be told to relayout, we actually start the layout with
the parent.

In practice, this chains, and we end up with nodes that point to
ancestors ten or more steps up the tree such that when the inner most
child re-lays-out, the whole app ends up relaying out.

This patch tries to short-circuit this for the case where the
constraints being applied to the child are such that actually, the
child has no choice about its dimensions. In that case, the parent
can't change dimensions when the child re-lays-out.

This makes a huge difference on the stocks demo app. Without this, on
the third rendered frame, there are 72 relayoutSubtreeRoot links, the
deepest chain is 8 deep, and 9 of the chains are only 1 level deep.
With it, there are 63 relayoutSubtreeRoot links, the deepest chain is
only 4 deep, and 38 of the chains are only 1 level deep.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1196553004.

TBR=ianh@google.com

Review URL: https://codereview.chromium.org/1204483002.

R=abarth@chromium.org, abarth, hixie

Review URL: https://codereview.chromium.org/1194743003.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1201983004.

Turn on wavy underlines. The waves aren't very pretty yet (they are too short somehow), I'll fix that in a subsequent CL.

I abstracted out the wavy underline code so that it doesn't duplicate the code for horizontal and vertical lines.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1201503003.

Renames hitTest to isPointInside

Refactor sorting of children in nodes

Fixes zPosition in sprites and hides internal methods

Adds scaleX / scaleY properties

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1190393004.

Currently only the decoration property is actually translated to a CSS style.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1174213005.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1197493002.

TBR=abarth

Review URL: https://codereview.chromium.org/1189113004.

Currently you lose your scroll and drawer state when coming back from the settings pane.
I think we should solve this by having the Navigator maintain a Stack and
keeping the StockHome alive underneath it. But this is good enough for a first iteration.

R=abarth@chromium.org, abarth

Review URL: https://codereview.chromium.org/1191153002.

Enabling/disabling of handling multiple pointers
Adds basic touch handling

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1179413009.

tree of InlineStyle and InlineText elements.
StyledText builds an Inline that renders the tree.

For example this StyledText object:

  new StyledText(["FOO", [boldLargerStyle, [greenStyle "BAR"], "BAZ"] BORF]);

Renders the same way the following HTML would,
assuming that TextStyles boldLargerStyle and
greenStyle were defined.

<style>
div {
  display: inline;
}
</style>
<p>
  <div>
    FOO
    <div style="font-weight:bold; font-size:larger">
      <div style="color:green">
        BAR
      </div>
      BAZ
    </div>
    BORF
  </div>
</p>

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1194693002.

Flesh out a README.md file for the SDK.
Make the stocks app test wait for the app to be mounted, to catch some more errors, like typos in the mount callback.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1182053012.

I use it a lot to test and demo the painting API.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1188823008.

Add a test for RenderDecoratedBox sets up the Paint object correctly.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1185423003.

R=ianh@google.com, abarth@chromium.org

Review URL: https://codereview.chromium.org/1182993003.

We can't have two copies of |embedder.dart| or |shell.dart| because they take
ownership of some underlying Mojo handles. Instead of duplicating the code,
this CL makes the old locations just export all the symbols from the new
location. I've also done the same with fetch.dart to avoid code duplication.

Finally, I've removed image_cache.dart in the old location because the only
clients already live in the new world and ought to use the new location.

TBR=ianh@google.com

Review URL: https://codereview.chromium.org/1179923004.

Some files are moved by this:
  Copy framework/node.dart into types/ - preparing for framework/'s decomissioning.
  Move app/scheduler.dart into sky/scheduler.dart - "app" doesn't really make sense.

As part of the SkyBinding cleanup, I made the hit-testing less
RenderBox-specific, by having the HitTestEntry.target member be a
HitTestTarget, which is an interface with the handleEvent() function,
which is then implemented by RenderBox. In theory, someone could now
extend hit testing from the RenderBox world into their own tree of
nodes, and take part in all the same dispatch logic automatically.

This involved moving all the hit testing type definitions into a new
sky/hittest.dart file.

Renamed SkyBinding._app to SkyBinding._instance for clarity.

Moved code around in SkyBinding so that related things are together.

Made WidgetSkyBinding use the existing SkyBinding.instance singleton
logic rather than having its own copy.

I also added some stub README.md files that describe dependencies.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1187393002.

Move app/view.dart to rendering/sky_binding.dart since it's part of the RenderObject API, really (it knows about RenderView intimately).
The tests pass. I didn't check every last example.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1183913006.

Also, trim the redundant |Mode| suffix from the TransferMode names.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1188003006.

Buttons and menu items use onPressed. Also, don't pass along the sky.Event
because that's a lower-level concept.

I've also reordered parameter lists to put the |child| argument last in a
number of places.

Also, fixed a bug where FloatingActionButton was missing syncFields.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1188993003.

Defined constants for all 9 CSS font-weight values
with conventional names from the "Common weight
name mapping" section of
https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight.

The FontWeight enum now just enumerates the actual
CSS weight values.

I've moved the TextStyle class into its own file.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1173323004.

This also moves the test for stocks into a new tests/examples/
directory, where we can put tests that test the examples.

TBR=abarth

Review URL: https://codereview.chromium.org/1182223004.