This is a known bug in some recent Chrome canaray and dev versions. It is already fixed in canary and will be fixed in the next dev version. It is not your fault, you can only wait and user a different browser or use a different Chrome release channel until the next dev version is released.
Source: https://code.google.com/p/chromium/issues/detail?id=514067
Update: With the just released update to 46.0.2471.2 dev-m on the dev channel, the issue is fixed :)