Bug 912817 - Add a separate class for mixed display with active content blocked.
Backed out changeset 88fd66b4944c (bug 897221)
Bug 912817 - Backed out changeset 690752e6d8a3

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extra : rebase_source : 021aad413a2b3e1b069c60d9b5557773aaadc144
Bug 888109: Float32 general optimizations for IonMonkey: framework and arithmetic operations; r=sstangl,nbp
Bug 912817 - Add a new class for mixed display content loaded / active content blocked to differentiate it from the mixed display content loaded / no active content case. r=jaws