I think this is a beautiful example of competition at work. Google Chrome enabled them to forge ahead of the other browsers to scratch their own itch. Facebook evaluated their work and it checked out, so it will become the defecto standard as others join in using it. Thus, standardiztions committees avoid clean room engineering and instead formalize proven implementations for broader distribution.
As a side note, "defecto standard" is a great turn of phrase which seems to never have been used intentionally. Googling it results in pages and pages of very serious documents which intended to use "de facto standard".
