No bug - Remove the executable bit from HTMLMediaElement.{h,cpp}.
Bug 1086510 - Remove set-only flags from HTMLContentSink; r=hsivonen
Bug 1089370 - Don't null-check a reference in nsContentUtils::CreateContextualFragment; r=jst
This triggers an undefined-bool-conversion warning in recent LLVM. The
dereference is safe because nsAutoTArray is infallible.