Add pref layers.bufferrotation.enabled from http://hg.mozilla.org/mozilla-central/rev/c6962b015a6a
Add pref layers.bufferrotation.enabled from http://hg.mozilla.org/mozilla-central/rev/c6962b015a6a

MozillaSecurity/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz