Just an update from the Google side: As discussed below, any Android users on 4.4+ or running Chrome are not affected. For earlier versions of Android, we've shipped patches for AOSP:
https://android.googlesource.com/platform/external/webkit/+/... https://android.googlesource.com/platform/external/webkit/+/...
These are in the AOSP branches for jb-dev, jb-mr1-dev, jb-mr1.1-dev, and jb-mr2-dev.