dart-lang/spark — pull request #610 by umop (2014-01-08 21:12:33+00:00)
Title: Embedded icon assets to polymer css

Here is an example of all three (hardcoded for display):

![image](https://f.cloud.github.com/assets/357955/1872630/92a1b226-78a9-11e3-86a9-7b061e73cdcb.png)