This dramatically simplifies the layout model.
I haven't gone through and simplified the existing functions, we should probably go through and figure out if they can be cleaned up a bit.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1161983004

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1143153011

This gets things off the ground barely enough to show some pixels.
These are not pixels that are actually part of the stock app, but
it's a start.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1157033006

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1144193006

TBR=abarth

Review URL: https://codereview.chromium.org/1153273002

Also, fix the style in Rect.cpp/.h.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1158843002

I had to add back document.createText() since new Text()
does not work in the new world yet.

LayoutRoot is a new Dart-exposed class which holds the Frame and
all associated machinery, sufficient to trigger a restyle
and layout of the subtree.

This is all kinda hacky and I'm sure likely to cause many
crashes if folks call random methods on these disconnected
trees.

But this makes it at least possible to paint text for now
and we can improve this in the coming days.

This really should have Adam's review.  It's hugely hacky
but I'd like to negotiate out with him the timeline on
which we should fix some of these hacks.

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

Review URL: https://codereview.chromium.org/1148253003

This was supposed to be in https://codereview.chromium.org/1153223003

TBR=abarth

Review URL: https://codereview.chromium.org/1160763003

This was supposed to be in https://codereview.chromium.org/1153893006/

TBR=abarth

Review URL: https://codereview.chromium.org/1151383003

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1153893006

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1153223003

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1156543004

- makes the event logic not involve a boolean return value (since we ignored it anyway)
- splits the event handling logic into two steps, hit testing and event dispatch
- introduces an App class on the Dart side to factor out the interaction with the C++ side
- ports sector-layout and simple_render_tree to the new App infrastructure
- port simple_render_tree to the new event handling logic
- implement hit testing for the sector-layout demo

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1143343004

R=sethladd@google.com, sethladd

Review URL: https://codereview.chromium.org/1159763003

- the circle now fills the screen
- you can set dimensions on the solid color node
- debugging printfs and rects are gone
- the protocol is changed so that for sectors, you position before you size (since your size and your childrens' positions all depend on your own position)

TBR=abarth

Review URL: https://codereview.chromium.org/1154213003

Could be useful for watch faces. :-)
Includes some minor fixes to layout2.dart.
Includes adding a very basic path API.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1152383002

This only handles really basic cases and doesn't understand
justification, wrapping, and so on. Submitting for code
review so I can get some early feedback before I invest
more time into making it correct.

R=ianh@google.com, abarth

Review URL: https://codereview.chromium.org/1151293002

R=ianh@google.com

Review URL: https://codereview.chromium.org/1152603002

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1151613005

This demo shows how to create a spinning square using the lowest-level APIs. We
should probably create more spinning square demos at the other layers of the
system.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1147393002

This CL makes simple_render_tree.dart interactive by making the hit testing
system work. I've also added a mechanism for requesting an animation frame.

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

Review URL: https://codereview.chromium.org/1153543002

This CL teaches simple_render_tree how to do a block layout using layout2.dart.

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

Review URL: https://codereview.chromium.org/1144423002

This example shows how to draw a circle using subclasses of RenderNode.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1144193004

Clients can now register a callback that gets called whenever we have an event
for the view. We'll need to update the Event class at some point, but this is a
start.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1129333005

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1133353008

This CL teaches SkyView the width, height, and device pixel ratio of the
display. In the future, we'll want some sort of notification system for when
these values change.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1139823010

This CL adds a global view object that can receive a Picture and be signaled to
draw. When using SkyView, this Picture shows up on screen.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1134913003

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1145843002

This CL makes the SkyView codepath smart enough to print "hello, world" to the
console. The code path is off by default but can be enabled by changing one
line of code.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1131673011

to provide a better Dart API.

When the attribute is present on an IDL interface, the generate Dart code will be a private interface that can extended by custom dart code.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1135283005

Revert "Add library names to many sky libraries"

This reverts commit 1337e0a803a54ee92d6dce7f8c4a6335f7cbb9fa.

BUG=
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1142893007

- Analyzer complains about libraries not having names. This adds names to many libraries.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1150433002

I wrote another copy of paint_element_into_displaylist
using this new technology.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1129353010

Currently said elements need to be in the DOM and have
already been laid out for this to work, but follow-up patches
will remove these restrictions.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1144673002

NOTE: This CL appears far larger than it actually is for two reasons:

1) Many files were moved around to use the Dart package directory structure.
2) Many .dart files had to have import paths updated.

- Organize mojo/public/dart so that it uses standard Dart package layout
- Organize mojo/dart/apptest so that it uses a standard Dart package layout
- Organize sky/sdk so that it uses a standard Dart package layout
- Create a mojo/testing package (used by unittests)
- Introduce the 'dart_pkg' gn rule which populates gen/Config/dart-pkg
- All internally vended Dart packages must have a corresponding dart_pkg rule
- It is now possible to use dependency_overrides: in pubspec.yaml to mix internal and external package dependencies (enables analyzer, editor, webstorm usage for internal developers).
- Package root for dart content handler ends with "packages/"
- Imports of mojo package uris no longer need the "public/dart"
- mojo/public/tools/dart_package.py is a clone of mojo/public/tools/gn/zip.py
- Sky tests no longer run 'deploy_sdk' script.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1132063007

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1132983007

TBR=eseidel

Review URL: https://codereview.chromium.org/1141013003

Also includes a link to all the know bugs that affect the stock app.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1145523003

Changes:
- adds a couple of radio buttons to the drawer menu list.
- makes menu items support being tapped and reporting the tap.
- hooks up the checkbox to actually support being checked.
- changes the drawer menu items to make more sense in a stock app.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1137373004

This is a prerequisite to dropping 'display:none'.
Included in this CL is making AnimatedValue able to animate more than one field.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1126333006