backout fc98067f0aa4 (Bug 888548 part 3) for B2G build bustage
backout f607ac59de19 (Bug 888548 part 2) for B2G build bustage
backout 1e31542e117c (Bug 888548 part 1) for B2G build bustage on a CLOSED TREE
Bug 900242: Mark overriding nsBlockFrame methods as MOZ_OVERRIDE. r=mats
Bug 900246: Mark variable as DebugOnly in DirectionalityUtils.cpp, to fix opt "unused variable" build warning. r=smontagu
Bug 900284:  Use #ifdef ACCESSIBILITY around member variables only used inside #ifdef ACCESSIBILITY, to avoid clang warnings (and reduce object size with --disable-accessibility).  r=dbaron
Bug 899946 - strange call to crypto.generateCRMFRequest from test_bug882865.html. r=Ms2ger