Someone noticed the same problem here: Chrome for Android does not display Google webfonts correctly
I noticed the problem as well today. The Google Web Fonts are simply not rendered by Chrome for Android on my Nexus 7 (Android 4.2.2), when integrated from Google directly. I also noticed the same problem on Chrome for MacOS X.
To get around this, you could simply download the fonts and convert them on http://www.fontsquirrel.com/ for web usage.