Ensure model is passed with <template if>

Ensure model is passed with <template if>
port of https://github.com/Polymer/mdv/commit/78bd4e2c8e569580863bb80cea90f36ef38f5290 and https://github.com/Polymer/mdv/commit/50d4074d05bd57cd8f76ba7952bf740a7386c1ce

R=sigmund@google.com

Committed: https://code.google.com/p/dart/source/detail?r=25374

[Siggi Cherem (dart-lang), 2013-07-23 20:44:13]

lgtm

https://codereview.chromium.org/19744006/diff/1/pkg/mdv/lib/src/template_iter...
File pkg/mdv/lib/src/template_iterator.dart (right):

https://codereview.chromium.org/19744006/diff/1/pkg/mdv/lib/src/template_iter...
pkg/mdv/lib/src/template_iterator.dart:53: !attrs.containsKey('repeat')) {
might be worth adding a small comment here. Initially I thought we had to also
also check that 'if' was ''. if I understand correctly, the binding of the 'if'
is not relevant. It is only used for the condition, but not for the body of the
template.

[Jennifer Messerly, 2013-07-23 22:11:59]

https://chromiumcodereview.appspot.com/19744006/diff/1/pkg/mdv/lib/src/templa...
File pkg/mdv/lib/src/template_iterator.dart (right):

https://chromiumcodereview.appspot.com/19744006/diff/1/pkg/mdv/lib/src/templa...
pkg/mdv/lib/src/template_iterator.dart:53: !attrs.containsKey('repeat')) {
On 2013/07/23 20:44:14, Siggi Cherem (dart-lang) wrote:
> might be worth adding a small comment here. Initially I thought we had to also
> also check that 'if' was ''. if I understand correctly, the binding of the
'if'
> is not relevant. It is only used for the condition, but not for the body of
the
> template.

Done.

[Jennifer Messerly, 2013-07-23 22:12:24]

Committed patchset #2 manually as r25374 (presubmit successful).