Latest attempt to polymer-build scripts in fix windows

Latest attempt to polymer-build scripts in fix windows

R=jmesserly@google.com

Committed: https://code.google.com/p/dart/source/detail?r=27457

[Siggi Cherem (dart-lang), 2013-09-12 22:11:29]

https://codereview.chromium.org/24126002/diff/3001/pkg/polymer/lib/src/transf...
File pkg/polymer/lib/src/transform/common.dart (right):

https://codereview.chromium.org/24126002/diff/3001/pkg/polymer/lib/src/transf...
pkg/polymer/lib/src/transform/common.dart:51: if (currentPackage == null ||
entryPoints == null) {
this change is not needed, but I think it's better this way.

Before if you specified entrypoint = "example/foo.dart', we would say here that
this it is not an entrypoint because it is not under web/ or test/.

This changes it so that the entrypoint list takes priority.

[Siggi Cherem (dart-lang), 2013-09-12 22:18:05]

https://codereview.chromium.org/24126002/diff/3001/pkg/polymer/lib/src/barbac...
File pkg/polymer/lib/src/barback_runner.dart (right):

https://codereview.chromium.org/24126002/diff/3001/pkg/polymer/lib/src/barbac...
pkg/polymer/lib/src/barback_runner.dart:197: if (dir.existsSync())
dir.deleteSync(recursive: true);
this other change is also unnecessary, but I think it makes things simpler: this
deletes and recreates the output folder, instead of  just deleting individual
'packages' directories.

[Jennifer Messerly, 2013-09-12 22:39:50]

lgtm

[Siggi Cherem (dart-lang), 2013-09-12 22:42:58]

Committed patchset #2 manually as r27457 (presubmit successful).