Cleanup events related to material splashes

Cleanup events related to material splashes

This CL is a warmup for using a more sophisticated gesture disambiguation.

1) Use gesturetap instead of click. We should probably remove click events
   because folks should use gesturetap to integrate with the gesture system.

2) Handle the case where you swipe the drawer during an animation. Previously
   we had an assert which triggered in some multitouch scenarios. We'll
   eventually move this over to gestureswipe.

3) Remove an extra container for ink splashes. There's no need to group all the
   ink splashes in a container. They can all just be children of the Material
   component itself. This structure is left over from when Material was a base
   class.

R=eseidel@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/3df236b69420f63891b9dcd2891fcaa897f98320

[eseidel, 2015-03-16 23:21:26]

https://codereview.chromium.org/1013713005/diff/1/sky/framework/components/ch...
File sky/framework/components/checkbox.dart (right):

https://codereview.chromium.org/1013713005/diff/1/sky/framework/components/ch...
sky/framework/components/checkbox.dart:62: events.listen('gesturetap',
_handleClick);
Should events.listen assert/log for any name it doesn't know?  Should these
names eventually be classes?

[abarth-chromium, 2015-03-16 23:22:55]

https://codereview.chromium.org/1013713005/diff/1/sky/framework/components/ch...
File sky/framework/components/checkbox.dart (right):

https://codereview.chromium.org/1013713005/diff/1/sky/framework/components/ch...
sky/framework/components/checkbox.dart:62: events.listen('gesturetap',
_handleClick);
On 2015/03/16 at 23:21:25, eseidel wrote:
> Should events.listen assert/log for any name it doesn't know?  Should these
names eventually be classes?

Oh, click is a real event in our system currently.  We might want to remove it
once we have the gesture system working well.

[eseidel, 2015-03-16 23:59:30]

lgtm

[abarth-chromium, 2015-03-17 03:54:00]

Committed patchset #1 (id:1) manually as
3df236b69420f63891b9dcd2891fcaa897f98320 (presubmit successful).