Factor a PhaseOutput class out of Phase.

Factor a PhaseOutput class out of Phase.

This lays the groundwork for supporting a cross-package transform picking up on
a new transform that applies to one of its secondary inputs.

R=rnystrom@google.com
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=26545

[Bob Nystrom, 2013-08-21 21:23:40]

Very nice. LGTM.

https://codereview.chromium.org/23038018/diff/1/pkg/barback/lib/src/asset_nod...
File pkg/barback/lib/src/asset_node.dart (right):

https://codereview.chromium.org/23038018/diff/1/pkg/barback/lib/src/asset_nod...
pkg/barback/lib/src/asset_node.dart:183: /// Sets the node's
[AssetNode.transform] property.
Add a bit explaining when/why this will occur.

[nweiz, 2013-08-22 18:30:49]

https://codereview.chromium.org/23038018/diff/1/pkg/barback/lib/src/asset_nod...
File pkg/barback/lib/src/asset_node.dart (right):

https://codereview.chromium.org/23038018/diff/1/pkg/barback/lib/src/asset_nod...
pkg/barback/lib/src/asset_node.dart:183: /// Sets the node's
[AssetNode.transform] property.
On 2013/08/21 21:23:40, Bob Nystrom wrote:
> Add a bit explaining when/why this will occur.

Done.

[nweiz, 2013-08-22 18:31:31]

Committed patchset #2 manually as r26545 (presubmit successful).