https://code.google.com/p/chromium/issues/detail?id=137692#c104
Ticket opened in July 2012 and its not the only one of that kind.
In late April, one of the Chromium developers posted the following:
“An update for everyone that’s watching this one:
Our Windows font rendering is actively being worked on. Basic support for DirectWrite is now in Skia (to update from comment #13). At the same time, GDI was very deeply embedded in the Windows WebKit port and is still being rooted out. We hope to have something within a milestone or two that developers can start playing with. How fast it goes to stable is, as always, all about how fast we can root out and burn down any regressions.
We’ll update the thread here when it’s available behind a runtime flag for y’all to try out.”
So at least it’s being worked on, but from his statements it seems to be in extremely early stages of development, so this problem will go on for at least several more months.
So in total it will be at least a year before they make the font rendering readable again like it was before Chrome v20 shipped.