Just as a further set of links regarding subresource integrity in Chromium, you can try it today on Canary Chrome behind the "Enable experimental Web Platform features" flag. You can follow the feature's development here: https://code.google.com/p/chromium/issues/detail?id=355467
In fact, we're having a rather heated discussion on the security-dev@chromium.org mailing list right now, if anyone wants to follow along: https://groups.google.com/a/chromium.org/forum/#!topic/secur...