Bug 860913 part 1: Use ALLOW_THIS_IN_INITIALIZER_LIST macro to silence existing instances of MSVC warning C4355 in content/html/content/src/. r=mounir
Bug 860913 part 2: Replace arg-less MOZ_NOT_REACHED with MOZ_ASSERT in HTMLInputElement.cpp, to fix MSVC build warning and match intended semantics. r=mounir
Bug 860913 part 3: Mark content/html/content/src/ as FAIL_ON_WARNINGS. r=mounir