Add a dependency check for polymer-css-build to reproduce.sh

Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
NOTRY=true

Committed: https://crrev.com/e1937017280dc1aa2a69dd85c0bfc8716a9daf27
Cr-Commit-Position: refs/heads/master@{#416775}

[tsergeant, 2016-09-06 23:10:02]

lgtm

[Dan Beam, 2016-09-06 23:30:46]

Description was changed from

==========
Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
==========

to

==========
Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
NOTRY=true
==========

[Dan Beam, 2016-09-06 23:30:52]

The CQ bit was checked by dbeam@chromium.org

[commit-bot: I haz the power, 2016-09-06 23:31:15]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-06 23:36:28]

Description was changed from

==========
Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
NOTRY=true
==========

to

==========
Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
NOTRY=true
==========

[commit-bot: I haz the power, 2016-09-06 23:36:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-06 23:39:34]

Description was changed from

==========
Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
NOTRY=true
==========

to

==========
Add a dependency check for polymer-css-build to reproduce.sh

R=tsergeant@chromium.org
BUG=none
TEST=reproduce.sh blows up earlier when polymer-css-build npm module not
     installed
NOTRY=true

Committed: https://crrev.com/e1937017280dc1aa2a69dd85c0bfc8716a9daf27
Cr-Commit-Position: refs/heads/master@{#416775}
==========

[commit-bot: I haz the power, 2016-09-06 23:39:35]

Patchset 1 (id:??) landed as
https://crrev.com/e1937017280dc1aa2a69dd85c0bfc8716a9daf27
Cr-Commit-Position: refs/heads/master@{#416775}