[mediacapture-streams-tests] Bringing GetUserMedia tests more up to date. (#1068)

This patch mostly adds error callbacks when appropriate, fixes some indentation and adds prefixes for MediaStream, which is prefixed in Chrome.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1068

Received on Monday, 23 June 2014 14:56:05 UTC