SkyView should handle screen rotation

SkyView should handle screen rotation

This CL implements a basic version of screen rotation where we just relayout at
the new size. In the future, we'll want a fancy version where we transition
between the two layouts.

R=ianh@google.com
BUG=

Committed: https://chromium.googlesource.com/external/mojo/+/0630a34a9962d6a950e3651a8c7fac637e772b16

[eseidel, 2015-06-09 20:24:46]

eseidel@chromium.org changed reviewers:
+ eseidel@chromium.org

[eseidel, 2015-06-09 20:24:46]

lgtm

[Hixie, 2015-06-09 20:31:30]

ianh@google.com changed reviewers:
- eseidel@chromium.org

[Hixie, 2015-06-09 20:31:31]

lgtm

https://codereview.chromium.org/1177563002/diff/1/sky/sdk/lib/framework/app.dart
File sky/sdk/lib/framework/app.dart (right):

https://codereview.chromium.org/1177563002/diff/1/sky/sdk/lib/framework/app.d...
sky/sdk/lib/framework/app.dart:62: _renderView.layout(_viewConstraints);
I'm surprised this doesn't assert. We're not in debugDoingLayout here, yet this
is going to adjust the position and size of the whole tree.

[abarth-chromium, 2015-06-09 20:56:22]

Committed patchset #2 (id:20001) manually as
0630a34a9962d6a950e3651a8c7fac637e772b16 (presubmit successful).