GoogleWebComponents/google-signin — pull request #58 by nomego (2014-11-06 15:01:22+00:00)
Title: Use Google+ icon from core-icons instead of separate SVG assets

When vulcanizing for production, assets are not compiled in a streamlined way.
It's better to make use of an SVG iconset to ensure that the logo is included in the production files.
Also, core-icons already bundle a Google+ icon in the default iconset.
Finally, SVG icons can be styled with CSS for different themes instead of having separate SVGs.